| Cleveland/Hopkins International (CLE) | Cleveland | OH | Belfast Municipal to Cleveland/Hopkins International |
| Pryor Field Regional (DCU) | Decatur | AL | Belfast Municipal to Pryor Field Regional |
| Dodge City Regional (DDC) | Dodge City | KS | Belfast Municipal to Dodge City Regional |
| Decatur (DEC) | Decatur | IL | Belfast Municipal to Decatur |
| Decorah Municipal (DEH) | Decorah | IA | Belfast Municipal to Decorah Municipal |
| Effingham County Memorial (K1H2) | Effingham | IL | Belfast Municipal to Effingham County Memorial |
| Kingston-Ulster (K20N) | Kingston | NY | Belfast Municipal to Kingston-Ulster |
| Ocean City Municipal (K26N) | Ocean City | NJ | Belfast Municipal to Ocean City Municipal |
| Shelby County (K2H0) | Shelbyville | IL | Belfast Municipal to Shelby County |
| Maryland (K2W5) | Indian Head | MD | Belfast Municipal to Maryland |
| Eagles Nest (K31E) | West Creek | NJ | Belfast Municipal to Eagles Nest |
| Delaware Airpark (K33N) | Dover/Cheswold | DE | Belfast Municipal to Delaware Airpark |
| Lake In The Hills (K3CK) | Chicago | IL | Belfast Municipal to Lake In The Hills |
| Greene County Regional (K3J7) | Greensboro | GA | Belfast Municipal to Greene County Regional |
| Mount Hawley Auxiliary (K3MY) | Peoria | IL | Belfast Municipal to Mount Hawley Auxiliary |
| Old Bridge (K3N6) | Old Bridge | NJ | Belfast Municipal to Old Bridge |
| Scottsboro Municipal-Word Field (K4A6) | Scottsboro | AL | Belfast Municipal to Scottsboro Municipal-Word Field |
| Ticonderoga Municipal (K4B6) | Ticonderoga | NY | Belfast Municipal to Ticonderoga Municipal |
| Youngstown Elser Metro (K4G4) | Youngstown | OH | Belfast Municipal to Youngstown Elser Metro |
| Saratoga County (K5B2) | Saratoga Springs | NY | Belfast Municipal to Saratoga County |
| Odell Williamson Municipal (K60J) | Ocean Isle Beach | NC | Belfast Municipal to Odell Williamson Municipal |
| Middlebury State Airport (K6B0) | Middlebury | VT | Belfast Municipal to Middlebury State Airport |
| Indianapolis Regional (KMQJ) | Indianapolis | IN | Belfast Municipal to Indianapolis Regional |
| Michael J. Smith Field (KMRH) | Beaufort | NC | Belfast Municipal to Michael J. Smith Field |
| Bloomsburg Municipal Airport (KN13) | Bloomsburg | PA | Belfast Municipal to Bloomsburg Municipal Airport |
| Bradford County (KN27) | Towanda | PA | Belfast Municipal to Bradford County |
| Cherry Ridge (KN30) | Honesdale | PA | Belfast Municipal to Cherry Ridge |
| Stormville (KN69) | Stormville | NY | Belfast Municipal to Stormville |
| Joseph Y Resnick (KN89) | Ellenville | NY | Belfast Municipal to Joseph Y Resnick |
| Kennett Memorial (KNT) | Kennett | MO | Belfast Municipal to Kennett Memorial |
| Hanover County Municipal (KOFP) | Richmond | VA | Belfast Municipal to Hanover County Municipal |
| Currituck County Regional (KONX) | Currituck | NC | Belfast Municipal to Currituck County Regional |
| Detroit Grosse Ile Municipal (KONZ) | Detroit Grosse Ile | MI | Belfast Municipal to Detroit Grosse Ile Municipal |
| Brandywine (KOQN) | West Chester | PA | Belfast Municipal to Brandywine |
| Orr Regional (KORB) | Orr | MN | Belfast Municipal to Orr Regional |
| Price County (KPBH) | Phillips | WI | Belfast Municipal to Price County |
| Apalachicola Regional (AAF) | Apalachicola | FL | Belfast Municipal to Apalachicola Regional |
| Lehigh Valley International (ABE) | Allentown | PA | Belfast Municipal to Lehigh Valley International |
| Aberdeen Regional (ABR) | Aberdeen | SD | Belfast Municipal to Aberdeen Regional |
| Southwest Georgia Regional (ABY) | Albany | GA | Belfast Municipal to Southwest Georgia Regional |
| Antrim County (ACB) | Bellaire | MI | Belfast Municipal to Antrim County |
| Nantucket Memorial (ACK) | Nantucket | MA | Belfast Municipal to Nantucket Memorial |
| Waco Regional (ACT) | Waco | TX | Belfast Municipal to Waco Regional |
| Atlantic City International (ACY) | Atlantic City | NJ | Belfast Municipal to Atlantic City International |
| Lenawee County (ADG) | Adrian | MI | Belfast Municipal to Lenawee County |
| Ardmore Municipal (ADM) | Ardmore | OK | Belfast Municipal to Ardmore Municipal |
| Robert F Swinnie (ADR) | Andrews | SC | Belfast Municipal to Robert F Swinnie |
| Addison/Dallas (ADS) | Dallas | TX | Belfast Municipal to Addison/Dallas |
| Ada Municipal (ADT) | Ada | OK | Belfast Municipal to Ada Municipal |
| Albert Lea Municipal (AEL) | Albert Lea | MN | Belfast Municipal to Albert Lea Municipal |
| Alexandria International (AEX) | Alexandria | LA | Belfast Municipal to Alexandria International |
| Jaffrey Silver Ranch (AFN) | Jaffrey | NH | Belfast Municipal to Jaffrey Silver Ranch |
| Fort Worth Alliance (AFW) | Fort Worth | TX | Belfast Municipal to Fort Worth Alliance |
| Allegheny County (AGC) | Pittsburgh | PA | Belfast Municipal to Allegheny County |
| Magnolia Municipal (AGO) | Magnolia | AR | Belfast Municipal to Magnolia Municipal |
| Augusta Regional/Bush Field (AGS) | Augusta | GA | Belfast Municipal to Augusta Regional/Bush Field |
| Ardmore Downtown Executive (AHD) | Ardmore | OK | Belfast Municipal to Ardmore Downtown Executive |
| Amery Municipal (AHH) | Amery | WI | Belfast Municipal to Amery Municipal |
| Athens/Ben Epps (AHN) | Athens | GA | Belfast Municipal to Athens/Ben Epps |
| Alliance Municipal (AIA) | Alliance | NE | Belfast Municipal to Alliance Municipal |
| Anderson Municipal-Darlington Field (AID) | Anderson | IN | Belfast Municipal to Anderson Municipal-Darlington Field |
| Aiken Regional (AIK) | Aiken | SC | Belfast Municipal to Aiken Regional |
| Atlantic Municipal (AIO) | Atlantic | IA | Belfast Municipal to Atlantic Municipal |
| George Downer (AIV) | Aliceville | AL | Belfast Municipal to George Downer |
| Lee C Fine Memorial (AIZ) | KAISER/LAKE OZARK | MO | Belfast Municipal to Lee C Fine Memorial |
| Akron Fulton International (AKC) | Akron | OH | Belfast Municipal to Akron Fulton International |
| Colorado Plains Regional (AKO) | Akron | CO | Belfast Municipal to Colorado Plains Regional |
| Albany International (ALB) | Albany | NY | Belfast Municipal to Albany International |
| St Louis Regional (ALN) | Alton | IL | Belfast Municipal to St Louis Regional |
| Waterloo Regional (ALO) | Waterloo | IA | Belfast Municipal to Waterloo Regional |
| Thomas C Russell Field (ALX) | Alexander City | AL | Belfast Municipal to Thomas C Russell Field |
| Rick Husband Amarillo International (AMA) | Amarillo | TX | Belfast Municipal to Rick Husband Amarillo International |
| Gratiot Community (AMN) | Alma | MI | Belfast Municipal to Gratiot Community |
| Ames Municipal (AMW) | Ames | IA | Belfast Municipal to Ames Municipal |
| Anniston Regional (ANB) | Anniston | AL | Belfast Municipal to Anniston Regional |
| Anderson Regional (AND) | Anderson | SC | Belfast Municipal to Anderson Regional |
| Tri-State Steuben County (ANQ) | Angola | IN | Belfast Municipal to Tri-State Steuben County |
| Ainsworth Regional (ANW) | Ainsworth | NE | Belfast Municipal to Ainsworth Regional |
| Lima Allen County (AOH) | Lima | OH | Belfast Municipal to Lima Allen County |
| Altoona/Blair County (AOO) | Altoona | PA | Belfast Municipal to Altoona/Blair County |
| Naples Municipal (APF) | Naples | FL | Belfast Municipal to Naples Municipal |
| Alpena County Regional (APN) | Alpena | MI | Belfast Municipal to Alpena County Regional |
| Marion County-Brown Field (APT) | Jasper | TN | Belfast Municipal to Marion County-Brown Field |
| New Iberia/Acadiana Regional (ARA) | New Iberia | LA | Belfast Municipal to New Iberia/Acadiana Regional |
| Ann Arbor Municipal (ARB) | Ann Arbor | MI | Belfast Municipal to Ann Arbor Municipal |
| Walnut Ridge Regional (ARG) | Walnut Ridge | AR | Belfast Municipal to Walnut Ridge Regional |
| Watertown International (ART) | Watertown | NY | Belfast Municipal to Watertown International |
| Lakeland/Noble F. Lee Memorial Field (ARV) | Minocqua | WI | Belfast Municipal to Lakeland/Noble F. Lee Memorial Field |
| Andros Town/Fresh Creek (ASD) | Andros Island | | Belfast Municipal to Andros Town/Fresh Creek |
| Nashua-Boire Field (ASH) | Nashua | NH | Belfast Municipal to Nashua-Boire Field |
| Harrison County (ASL) | Marshall | TX | Belfast Municipal to Harrison County |
| Talladega Municipal (ASN) | Talladega | AL | Belfast Municipal to Talladega Municipal |
| John F Kennedy Memorial (ASX) | Ashland | WI | Belfast Municipal to John F Kennedy Memorial |
| Ashley Municipal (ASY) | Ashley | ND | Belfast Municipal to Ashley Municipal |
| Arthur's Town (ATC) | Cat Island | | Belfast Municipal to Arthur's Town |
| Antlers Municipal (ATE) | Antlers | OK | Belfast Municipal to Antlers Municipal |
| Hartsfield Jackson Atlanta International (ATL) | Atlanta | GA | Belfast Municipal to Hartsfield Jackson Atlanta International |
| Gordon K Bush Ohio University (ATO) | Athens/Albany | OH | Belfast Municipal to Gordon K Bush Ohio University |
| Appleton International (ATW) | Appleton | WI | Belfast Municipal to Appleton International |
| Austin Municipal (AUM) | Austin | MN | Belfast Municipal to Austin Municipal |
| Auburn University Regional (AUO) | Auburn | AL | Belfast Municipal to Auburn University Regional |
| Wausau Downtown (AUW) | Wausau | WI | Belfast Municipal to Wausau Downtown |
| Chicago/Aurora Municipal (AUZ) | Chicago | IL | Belfast Municipal to Chicago/Aurora Municipal |
| Asheville Regional (AVL) | Asheville | NC | Belfast Municipal to Asheville Regional |
| Avon Park Executive (AVO) | Avon Park | FL | Belfast Municipal to Avon Park Executive |
| Wilkes-Barre/Scranton International (AVP) | Scranton | PA | Belfast Municipal to Wilkes-Barre/Scranton International |
| West Memphis Municipal (AWM) | West Memphis | AR | Belfast Municipal to West Memphis Municipal |
| Chandler Field (AXN) | Alexandria | MN | Belfast Municipal to Chandler Field |
| Spring Point (AXP) | Acklins Island | | Belfast Municipal to Spring Point |
| Altus/Quartz Mountain Regional (AXS) | Altus | OK | Belfast Municipal to Altus/Quartz Mountain Regional |
| Auglaize County Neil Armstrong (AXV) | Wapakoneta | OH | Belfast Municipal to Auglaize County Neil Armstrong |
| Waycross-Ware County (AYS) | Waycross | GA | Belfast Municipal to Waycross-Ware County |
| Kalamazoo/Battle Creek International (AZO) | Kalamazoo | MI | Belfast Municipal to Kalamazoo/Battle Creek International |
| El Catey Presidente Juan Bosch (AZS) | Samana | | Belfast Municipal to El Catey Presidente Juan Bosch |
| Barnes Municipal (BAF) | Westfield | MA | Belfast Municipal to Barnes Municipal |
| Benson Municipal (BBB) | Benson | MN | Belfast Municipal to Benson Municipal |
| Bay City Regional (BBC) | Bay City | TX | Belfast Municipal to Bay City Regional |
| Broken Bow Municipal/Keith Glaze Field (BBW) | Broken Bow | NE | Belfast Municipal to Broken Bow Municipal/Keith Glaze Field |
| Wings Field (BBX) | Philadelphia | PA | Belfast Municipal to Wings Field |
| Virginia Tech Montgomery Executive (BCB) | Blacksburg | VA | Belfast Municipal to Virginia Tech Montgomery Executive |
| Boca Raton (BCT) | Boca Raton | FL | Belfast Municipal to Boca Raton |
| Baudette International (BDE) | Baudette | MN | Belfast Municipal to Baudette International |
| Bradley International (BDL) | Windsor Locks | CT | Belfast Municipal to Bradley International |
| Igor I Sikorsky Memorial (BDR) | Bridgeport | CT | Belfast Municipal to Igor I Sikorsky Memorial |
| Beech Factory (BEC) | Wichita | KS | Belfast Municipal to Beech Factory |
| Laurence G Hanscom Field (BED) | Bedford | MA | Belfast Municipal to Laurence G Hanscom Field |
| Southwest Michigan Regional (BEH) | Benton Harbor | MI | Belfast Municipal to Southwest Michigan Regional |
| Bradford Regional (BFD) | Bradford | PA | Belfast Municipal to Bradford Regional |
| Western Nebraska Regional/William B Heilig Field (BFF) | Scottsbluff | NE | Belfast Municipal to Western Nebraska Regional/William B Heilig Field |
| Mobile Downtown (BFM) | Mobile | AL | Belfast Municipal to Mobile Downtown |
| Beaver County (BFP) | Beaver Falls | PA | Belfast Municipal to Beaver County |
| Virgil I Grissom Municipal (BFR) | Bedford | IN | Belfast Municipal to Virgil I Grissom Municipal |
| Beaufort County (BFT) | Beaufort | SC | Belfast Municipal to Beaufort County |
| Hutchinson County (BGD) | Borger | TX | Belfast Municipal to Hutchinson County |
| Decatur County Industrial Air Park (BGE) | Bainbridge | GA | Belfast Municipal to Decatur County Industrial Air Park |
| Greater Binghamton Edwin A Link Field (BGM) | Binghamton | NY | Belfast Municipal to Greater Binghamton Edwin A Link Field |
| Birmingham-Shuttlesworth International (BHM) | Birmingham | AL | Belfast Municipal to Birmingham-Shuttlesworth International |
| Beatrice Municipal (BIE) | Beatrice | NE | Belfast Municipal to Beatrice Municipal |
| South Bimini (BIM) | Bimini Islands | | Belfast Municipal to South Bimini |
| Bismarck Municipal (BIS) | Bismarck | ND | Belfast Municipal to Bismarck Municipal |
| Bemidji Regional (BJI) | Bemidji | MN | Belfast Municipal to Bemidji Regional |
| Wayne County (BJJ) | Wooster | OH | Belfast Municipal to Wayne County |
| Stephens County (BKD) | Breckenridge | TX | Belfast Municipal to Stephens County |
| Branson (BKG) | Branson | MO | Belfast Municipal to Branson |
| Burke Lakefront (BKL) | Cleveland | OH | Belfast Municipal to Burke Lakefront |
| Allen C Perkinson Blackstone Army Air Field (BKT) | Blackstone | VA | Belfast Municipal to Allen C Perkinson Blackstone Army Air Field |
| Raleigh County Memorial (BKW) | Beckley | WV | Belfast Municipal to Raleigh County Memorial |
| Brookings Regional (BKX) | Brookings | SD | Belfast Municipal to Brookings Regional |
| Mercer County (BLF) | Bluefield | WV | Belfast Municipal to Mercer County |
| Monmouth Executive (BLM) | Belmar | NJ | Belfast Municipal to Monmouth Executive |
| MidAmerica St Louis Scott AFB (BLV) | Belleville | IL | Belfast Municipal to MidAmerica St Louis Scott AFB |
| Monroe County (BMG) | Bloomington | IN | Belfast Municipal to Monroe County |
| Central Illinois Regional at Bloomington Normal (BMI) | Bloomington | IL | Belfast Municipal to Central Illinois Regional at Bloomington Normal |
| Berlin Regional (BML) | Berlin | NH | Belfast Municipal to Berlin Regional |
| Beaumont Municipal (BMT) | Beaumont | TX | Belfast Municipal to Beaumont Municipal |
| Nashville International (BNA) | Nashville | TN | Belfast Municipal to Nashville International |
| Barnwell Regional (BNL) | Barnwell | SC | Belfast Municipal to Barnwell Regional |
| Boone Municipal (BNW) | Boone | IA | Belfast Municipal to Boone Municipal |
| Boston Logan International (BOS) | Boston | MA | Belfast Municipal to Boston Logan International |
| Bartow Executive (BOW) | Bartow | FL | Belfast Municipal to Bartow Executive |
| Jack Brooks Regional (BPT) | Beaumont/Port Arthur | TX | Belfast Municipal to Jack Brooks Regional |
| Brunswick Golden Isles (BQK) | Brunswick | GA | Belfast Municipal to Brunswick Golden Isles |
| Aguadilla/Rafael Hernandez (Borinquen) (BQN) | Aguadilla | | Belfast Municipal to Aguadilla/Rafael Hernandez (Borinquen) |
| Brainerd Lakes Regional (BRD) | Brainerd | MN | Belfast Municipal to Brainerd Lakes Regional |
| Southeast Iowa Regional (BRL) | Burlington | IA | Belfast Municipal to Southeast Iowa Regional |
| Samuels Field (BRY) | Bardstown | KY | Belfast Municipal to Samuels Field |
| Battle Creek Executive (BTL) | Battle Creek | MI | Belfast Municipal to Battle Creek Executive |
| Marlboro County Jetport - H.E. Avent Field (BTN) | Bennettsville | SC | Belfast Municipal to Marlboro County Jetport - H.E. Avent Field |
| Pittsburgh/Butler Regional Airport (BTP) | Butler | PA | Belfast Municipal to Pittsburgh/Butler Regional Airport |
| Baton Rouge Metro Ryan Field (BTR) | Baton Rouge | LA | Belfast Municipal to Baton Rouge Metro Ryan Field |
| Burlington International (BTV) | Burlington | VT | Belfast Municipal to Burlington International |
| Buffalo Niagara International (BUF) | Buffalo | NY | Belfast Municipal to Buffalo Niagara International |
| Butler Memorial (BUM) | Butler | MO | Belfast Municipal to Butler Memorial |
| Bartlesville Municipal (BVO) | Bartlesville | OK | Belfast Municipal to Bartlesville Municipal |
| Batesville Regional (BVX) | Batesville | AR | Belfast Municipal to Batesville Regional |
| Beverly Regional (BVY) | Beverly | MA | Belfast Municipal to Beverly Regional |
| Brownwood Regional (BWD) | Brownwood | TX | Belfast Municipal to Brownwood Regional |
| Bowling Green Warren County Regional (BWG) | Bowling Green | KY | Belfast Municipal to Bowling Green Warren County Regional |
| Baltimore/Washington Intl Thurgood Marshall (BWI) | Baltimore | MD | Belfast Municipal to Baltimore/Washington Intl Thurgood Marshall |
| Bowman Municipal (BWM) | Bowman | ND | Belfast Municipal to Bowman Municipal |
| George R Carr Memorial Airfield (BXA) | Bogalusa | LA | Belfast Municipal to George R Carr Memorial Airfield |
| Arkansas International (BYH) | Blytheville | AR | Belfast Municipal to Arkansas International |
| Wexford County (CAD) | Cadillac | MI | Belfast Municipal to Wexford County |
| Columbia Metropolitan (CAE) | Columbia | SC | Belfast Municipal to Columbia Metropolitan |
| Akron/Canton Regional (CAK) | Akron | OH | Belfast Municipal to Akron/Canton Regional |
| Cap Haitien (CAP) | Cap Haitien | | Belfast Municipal to Cap Haitien |
| Caribou Municipal (CAR) | Caribou | ME | Belfast Municipal to Caribou Municipal |
| Greater Cumberland Regional (CBE) | Cumberland | MD | Belfast Municipal to Greater Cumberland Regional |
| Council Bluffs Municipal (CBF) | Council Bluffs | IA | Belfast Municipal to Council Bluffs Municipal |
| Shalz Field (CBK) | Colby | KS | Belfast Municipal to Shalz Field |
| Winterland (CC2) | Winterland | New | Belfast Municipal to Winterland |
| Clinton Municipal (CCA) | Clinton | AR | Belfast Municipal to Clinton Municipal |
| Northeast Iowa Regional (CCY) | Charles City | IA | Belfast Municipal to Northeast Iowa Regional |
| Chub Cay (CCZ) | Berry Islands | | Belfast Municipal to Chub Cay |
| Harrell Field (CDH) | Camden | AR | Belfast Municipal to Harrell Field |
| Woodward Field (CDN) | Camden | SC | Belfast Municipal to Woodward Field |
| Chadron Municipal (CDR) | Chadron | NE | Belfast Municipal to Chadron Municipal |
| Childress Municipal (CDS) | Childress | TX | Belfast Municipal to Childress Municipal |
| Essex County (CDW) | Caldwell | NJ | Belfast Municipal to Essex County |
| Juniper (CE3) | Juniper | NB | Belfast Municipal to Juniper |
| Westover Arb/Westover Metropolitan (CEF) | Chicopee | MA | Belfast Municipal to Westover Arb/Westover Metropolitan |
| Oconee County Regional (CEU) | Clemson | SC | Belfast Municipal to Oconee County Regional |
| Mettel Field (CEV) | Connersville | IN | Belfast Municipal to Mettel Field |
| Bob Sikes (CEW) | Crestview | FL | Belfast Municipal to Bob Sikes |
| Kyle-Oakley Field (CEY) | Murray | KY | Belfast Municipal to Kyle-Oakley Field |
| Coulter Field (CFD) | Bryan | TX | Belfast Municipal to Coulter Field |
| Coffeyville Municipal (CFV) | Coffeyville | KS | Belfast Municipal to Coffeyville Municipal |
| Cambridge-Dorchester Regional (CGE) | Cambridge | MD | Belfast Municipal to Cambridge-Dorchester Regional |
| Cuyahoga County (CGF) | Cleveland | OH | Belfast Municipal to Cuyahoga County |
| Cape Girardeau Regional (CGI) | Cape Girardeau | MO | Belfast Municipal to Cape Girardeau Regional |
| Lovell Field (CHA) | Chattanooga | TN | Belfast Municipal to Lovell Field |
| Chickasha Municipal (CHK) | Chickasha | OK | Belfast Municipal to Chickasha Municipal |
| Charlottesville Albemarle (CHO) | Charlottesville | VA | Belfast Municipal to Charlottesville Albemarle |
| Charleston International (CHS) | Charleston | SC | Belfast Municipal to Charleston International |
| The Eastern Iowa (CID) | Cedar Rapids | IA | Belfast Municipal to The Eastern Iowa |
| Arthur N Neu (CIN) | Carroll | IA | Belfast Municipal to Arthur N Neu |
| Cairo Regional (CIR) | Cairo | IL | Belfast Municipal to Cairo Regional |
| Chippewa County International (CIU) | Sault Ste Marie | MI | Belfast Municipal to Chippewa County International |
| North Central West Virginia (CKB) | Clarksburg | WV | Belfast Municipal to North Central West Virginia |
| Fletcher Field (CKM) | Clarksdale | MS | Belfast Municipal to Fletcher Field |
| Crookston Municipal Kirkwood Field (CKN) | Crookston | MN | Belfast Municipal to Crookston Municipal Kirkwood Field |
| Outlaw Field (CKV) | Clarksville | TN | Belfast Municipal to Outlaw Field |
| Clintonville Municipal (CLI) | Clintonville | WI | Belfast Municipal to Clintonville Municipal |
| Clinton Regional (CLK) | Clinton | OK | Belfast Municipal to Clinton Regional |
| Easterwood Field (CLL) | College Station | TX | Belfast Municipal to Easterwood Field |
| Charlotte Douglas International (CLT) | Charlotte | NC | Belfast Municipal to Charlotte Douglas International |
| Columbus Municipal (CLU) | Columbus | IN | Belfast Municipal to Columbus Municipal |
| Clearwater Airpark (CLW) | Clearwater | FL | Belfast Municipal to Clearwater Airpark |
| John Glenn International (CMH) | Columbus | OH | Belfast Municipal to John Glenn International |
| University of Illinois-Willard (CMI) | Champaign/Urbana | IL | Belfast Municipal to University of Illinois-Willard |
| Houghton County Memorial (CMX) | Hancock | MI | Belfast Municipal to Houghton County Memorial |
| Sparta/Fort Mccoy (CMY) | Sparta | WI | Belfast Municipal to Sparta/Fort Mccoy |
| Claremont Municipal (CNH) | Claremont | NH | Belfast Municipal to Claremont Municipal |
| Chanute Martin Johnson (CNU) | Chanute | KS | Belfast Municipal to Chanute Martin Johnson |
| Waco Texas State Techical College (CNW) | Waco | TX | Belfast Municipal to Waco Texas State Techical College |
| Concord Municipal (CON) | Concord | NH | Belfast Municipal to Concord Municipal |
| Columbia Regional (COU) | Columbia | MO | Belfast Municipal to Columbia Regional |
| Congo Town (COX) | Andros Island | | Belfast Municipal to Congo Town |
| Exploitsvalley/Botwood (CP2) | Exploits Valley | New | Belfast Municipal to Exploitsvalley/Botwood |
| Debert (CQ3) | Debert | NS | Belfast Municipal to Debert |
| Florenceville (CR3) | Florenceville | NB | Belfast Municipal to Florenceville |
| Grand Strand North Myrtle Beach (CRE) | North Myrtle Beach | SC | Belfast Municipal to Grand Strand North Myrtle Beach |
| Jacksonville Executive at Craig (CRG) | Jacksonville | FL | Belfast Municipal to Jacksonville Executive at Craig |
| Colonel Hill (CRI) | Crooked Island | | Belfast Municipal to Colonel Hill |
| C David Campbell Field-Corsicana Municipal (CRS) | Corsicana | TX | Belfast Municipal to C David Campbell Field-Corsicana Municipal |
| Z M Jack Stell Field (CRT) | Crossett | AR | Belfast Municipal to Z M Jack Stell Field |
| Yeager (CRW) | Charleston | WV | Belfast Municipal to Yeager |
| Roscoe Turner (CRX) | Corinth | MS | Belfast Municipal to Roscoe Turner |
| St Stephen (Giddens Memorial) (CS3) | St Stephen | NB | Belfast Municipal to St Stephen (Giddens Memorial) |
| Chipman (CS4) | Chipman | NB | Belfast Municipal to Chipman |
| Columbus Metropolitan (CSG) | Columbus | GA | Belfast Municipal to Columbus Metropolitan |
| Clinton-Sherman (CSM) | Clinton | OK | Belfast Municipal to Clinton-Sherman |
| Creston Municipal (CSQ) | Creston | IA | Belfast Municipal to Creston Municipal |
| Crossville Memorial/Whitson Field (CSV) | Crossville | TN | Belfast Municipal to Crossville Memorial/Whitson Field |
| Chester County G O Carlson (CTH) | Coatesville | PA | Belfast Municipal to Chester County G O Carlson |
| Cortland County-Chase Field (CTX) | Cortland | NY | Belfast Municipal to Cortland County-Chase Field |
| Cross City (CTY) | Cross City | FL | Belfast Municipal to Cross City |
| Clinton-Sampson County (CTZ) | Clinton | NC | Belfast Municipal to Clinton-Sampson County |
| Jim Hamilton L.B. Owens (CUB) | Columbia | SC | Belfast Municipal to Jim Hamilton L.B. Owens |
| Cushing Municipal (CUH) | Cushing | OK | Belfast Municipal to Cushing Municipal |
| Cincinnati Northern Kentucky International (CVG) | Cincinnati | OH | Belfast Municipal to Cincinnati Northern Kentucky International |
| Kings County Municipal (CW3) | Waterville | NS | Belfast Municipal to Kings County Municipal |
| Central Wisconsin (CWA) | Mosinee | WI | Belfast Municipal to Central Wisconsin |
| Chennault International (CWF) | Lake Charles | LA | Belfast Municipal to Chennault International |
| Clinton Municipal (CWI) | Clinton | IA | Belfast Municipal to Clinton Municipal |
| Conroe North Houston Regional (CXO) | Houston | TX | Belfast Municipal to Conroe North Houston Regional |
| Charles Kirkconnell Intl (CYB) | Cayman Brac | | Belfast Municipal to Charles Kirkconnell Intl |
| Cheyenne Regional/Jerry Olson Field (CYS) | Cheyenne | WY | Belfast Municipal to Cheyenne Regional/Jerry Olson Field |
| Clarenville (CZ3) | Clarenville | New | Belfast Municipal to Clarenville |
| Burlington Executive (CZB) | Burlington | ON | Belfast Municipal to Burlington Executive |
| St Andrews/Codroy Valley (DA5) | St Andrews | New | Belfast Municipal to St Andrews/Codroy Valley |
| Daytona Beach International (DAB) | Daytona Beach | FL | Belfast Municipal to Daytona Beach International |
| Dallas Love Field (DAL) | Dallas | TX | Belfast Municipal to Dallas Love Field |
| Danville Regional (DAN) | Danville | VA | Belfast Municipal to Danville Regional |
| Dayton International James M Cox (DAY) | Dayton | OH | Belfast Municipal to Dayton International James M Cox |
| Dublin W H Bud Barron (DBN) | Dublin | GA | Belfast Municipal to Dublin W H Bud Barron |
| Dubuque Regional (DBQ) | Dubuque | IA | Belfast Municipal to Dubuque Regional |
| Denver International (DEN) | Denver | CO | Belfast Municipal to Denver International |
| Coleman A Young Municipal (DET) | Detroit | MI | Belfast Municipal to Coleman A Young Municipal |
| Defiance Memorial (DFI) | Defiance | OH | Belfast Municipal to Defiance Memorial |
| Dallas-Fort Worth International (DFW) | Dallas | TX | Belfast Municipal to Dallas-Fort Worth International |
| Converse County (DGW) | Douglas | WY | Belfast Municipal to Converse County |
| Dothan Regional (DHN) | Dothan | AL | Belfast Municipal to Dothan Regional |
| Dickinson Theodore Roosevelt Regional (DIK) | Dickinson | ND | Belfast Municipal to Dickinson Theodore Roosevelt Regional |
| Clearwater (DJ4) | Clearwater | NB | Belfast Municipal to Clearwater |
| Chautauqua County/Dunkirk (DKK) | Dunkirk | NY | Belfast Municipal to Chautauqua County/Dunkirk |
| Duluth International (DLH) | Duluth | MN | Belfast Municipal to Duluth International |
| Dillon County Airport (DLL) | Dillon | SD | Belfast Municipal to Dillon County Airport |
| Sedalia Regional (DMO) | Sedalia | MO | Belfast Municipal to Sedalia Regional |
| Daniel Field (DNL) | Augusta | GA | Belfast Municipal to Daniel Field |
| Dalton Municipal (DNN) | Dalton | GA | Belfast Municipal to Dalton Municipal |
| Denison Municipal (DNS) | Denison | IA | Belfast Municipal to Denison Municipal |
| Vermilion Regional (DNV) | Danville | IL | Belfast Municipal to Vermilion Regional |
| Dover AFB (DOV) | Dover | DE | Belfast Municipal to Dover AFB |
| Dupage (DPA) | Chicago | IL | Belfast Municipal to Dupage |
| Drummond Island (DRE) | Drummond Island | MI | Belfast Municipal to Drummond Island |
| Beauregard Regional (DRI) | De Ridder | LA | Belfast Municipal to Beauregard Regional |
| Destin Executive (DSI) | Destin | FL | Belfast Municipal to Destin Executive |
| Des Moines International (DSM) | Des Moines | IA | Belfast Municipal to Des Moines International |
| Dansville Municipal (DSV) | Dansville | NY | Belfast Municipal to Dansville Municipal |
| Detroit Lakes-Wething Field (DTL) | Detroit Lakes | MN | Belfast Municipal to Detroit Lakes-Wething Field |
| Shreveport Downtown (DTN) | Shreveport | LA | Belfast Municipal to Shreveport Downtown |
| Detroit Metro Wayne County (DTW) | Detroit | MI | Belfast Municipal to Detroit Metro Wayne County |
| Dunnville (DU9) | Dunnville | ON | Belfast Municipal to Dunnville |
| Durant Regional - Eaker Field (DUA) | Durant | OK | Belfast Municipal to Durant Regional - Eaker Field |
| Halliburton Field (DUC) | Duncan | OK | Belfast Municipal to Halliburton Field |
| Dubois Regional (DUJ) | DuBois | PA | Belfast Municipal to Dubois Regional |
| Devils Lake Regional (DVL) | Devils Lake | ND | Belfast Municipal to Devils Lake Regional |
| Davenport Municipal (DVN) | Davenport | IA | Belfast Municipal to Davenport Municipal |
| David Wayne Hooks Memorial (DWH) | Houston | TX | Belfast Municipal to David Wayne Hooks Memorial |
| Danbury Municipal (DXR) | Danbury | CT | Belfast Municipal to Danbury Municipal |
| Fogo (DY3) | Fogo | New | Belfast Municipal to Fogo |
| Doylestown (DYL) | Doylestown | PA | Belfast Municipal to Doylestown |
| Phifer Airfield (EAN) | Wheatland | WY | Belfast Municipal to Phifer Airfield |
| Kearney Regional (EAR) | Kearney | NE | Belfast Municipal to Kearney Regional |
| Chippewa Valley Regional (EAU) | Eau Claire | WI | Belfast Municipal to Chippewa Valley Regional |
| Iosco County (ECA) | East Tawas | MI | Belfast Municipal to Iosco County |
| Elizabeth City Regional & Coast Guard Station (ECG) | Elizabeth City | NC | Belfast Municipal to Elizabeth City Regional & Coast Guard Station |
| Northwest Florida Beaches International (ECP) | Panama City | FL | Belfast Municipal to Northwest Florida Beaches International |
| Mondell Field (ECS) | Newcastle | WY | Belfast Municipal to Mondell Field |
| Northeastern Regional (EDE) | Edenton | NC | Belfast Municipal to Northeastern Regional |
| El Dorado/Captain Jack Thomas Memorial (EDK) | El Dorado | KS | Belfast Municipal to El Dorado/Captain Jack Thomas Memorial |
| Dilliant-Hopkins (EEN) | Keene | NH | Belfast Municipal to Dilliant-Hopkins |
| Ellington (EFD) | Houston | TX | Belfast Municipal to Ellington |
| Northeast Kingdom International (EFK) | Newport | VT | Belfast Municipal to Northeast Kingdom International |
| Eagle River Union (EGV) | Eagle River | WI | Belfast Municipal to Eagle River Union |
| R Terrance B Lettsome Intl (EIS) | Tortola | | Belfast Municipal to R Terrance B Lettsome Intl |
| Elkhart Municipal (EKI) | Elkhart | IN | Belfast Municipal to Elkhart Municipal |
| Elkins/Randolph County (EKN) | Elkins | WV | Belfast Municipal to Elkins/Randolph County |
| Addington Field (EKX) | Elizabethtown | KY | Belfast Municipal to Addington Field |
| Eagle Lake (ELA) | Eagle Lake | TX | Belfast Municipal to Eagle Lake |
| South Arkansas Regional at Goodwin Field (ELD) | El Dorado | AR | Belfast Municipal to South Arkansas Regional at Goodwin Field |
| North Eleuthera (ELH) | Eleuthera Island | | Belfast Municipal to North Eleuthera |
| Elk City Regional Business (ELK) | Elk City | OK | Belfast Municipal to Elk City Regional Business |
| Elmira/Corning Regional (ELM) | Elmira | NY | Belfast Municipal to Elmira/Corning Regional |
| Wellsville Municipal/Tarantine Field (ELZ) | Wellsville | NY | Belfast Municipal to Wellsville Municipal/Tarantine Field |
| Emporia Municipal (EMP) | Emporia | KS | Belfast Municipal to Emporia Municipal |
| Centralia Municipal (ENL) | Centralia | IL | Belfast Municipal to Centralia Municipal |
| Kenosha Regional (ENW) | Kenosha | WI | Belfast Municipal to Kenosha Regional |
| Neosho Hugh Robinson (EOS) | Neosho | MO | Belfast Municipal to Neosho Hugh Robinson |
| Erie International/Tom Ridge Field (ERI) | Erie | PA | Belfast Municipal to Erie International/Tom Ridge Field |
| Delta County (ESC) | Escanaba | MI | Belfast Municipal to Delta County |
| Esler Regional (ESF) | Alexandria | LA | Belfast Municipal to Esler Regional |
| Easton/Newnam Field (ESN) | Easton | MD | Belfast Municipal to Easton/Newnam Field |
| Stroudsburg-Pocono (ESP) | East Stroudsburg | PA | Belfast Municipal to Stroudsburg-Pocono |
| Estherville Municipal (EST) | Estherville | IA | Belfast Municipal to Estherville Municipal |
| West Bend Municipal (ETB) | West Bend | WI | Belfast Municipal to West Bend Municipal |
| Eastland Municipal (ETN) | Eastland | TX | Belfast Municipal to Eastland Municipal |
| Enterprise Municipal (ETS) | Enterprise | AL | Belfast Municipal to Enterprise Municipal |
| Weedon Field (EUF) | Eufaula | AL | Belfast Municipal to Weedon Field |
| Eveleth-Virginia Municipal (EVM) | Eveleth | MN | Belfast Municipal to Eveleth-Virginia Municipal |
| Evansville Regional (EVV) | Evansville | IN | Belfast Municipal to Evansville Regional |
| New Bedford Regional (EWB) | New Bedford | MA | Belfast Municipal to New Bedford Regional |
| Newton City County (EWK) | Newton | KS | Belfast Municipal to Newton City County |
| Coastal Carolina Regional (EWN) | New Bern | NC | Belfast Municipal to Coastal Carolina Regional |
| Newark Liberty International (EWR) | Newark | NJ | Belfast Municipal to Newark Liberty International |
| Key West International (EYW) | Key West | FL | Belfast Municipal to Key West International |
| Farmington Regional (FAM) | Farmington | MO | Belfast Municipal to Farmington Regional |
| Hector International Fargo (FAR) | Fargo | ND | Belfast Municipal to Hector International Fargo |
| Fayetteville Regional/Grannis Field (FAY) | Fayetteville | NC | Belfast Municipal to Fayetteville Regional/Grannis Field |
| Faribault Municipal (FBL) | Faribault | MN | Belfast Municipal to Faribault Municipal |
| Flying Cloud (FCM) | Minneapolis | MN | Belfast Municipal to Flying Cloud |
| Frederick Municipal (FDK) | Frederick | MD | Belfast Municipal to Frederick Municipal |
| Frederick Regional (FDR) | Frederick | OK | Belfast Municipal to Frederick Regional |
| Findlay (FDY) | Findlay | OH | Belfast Municipal to Findlay |
| Albertus (FEP) | Freeport | IL | Belfast Municipal to Albertus |
| Fremont Municipal (FET) | Fremont | NE | Belfast Municipal to Fremont Municipal |
| First Flight (FFA) | Kill Devil Hills | NC | Belfast Municipal to First Flight |
| Fairfield Municipal (FFL) | Fairfield | IA | Belfast Municipal to Fairfield Municipal |
| Fergus Falls Municipal-Einar Mickelson Field (FFM) | Fergus Falls | MN | Belfast Municipal to Fergus Falls Municipal-Einar Mickelson Field |
| Capital City (FFT) | Frankfort | KY | Belfast Municipal to Capital City |
| Fox Harbour (FH4) | Fox Harbour | NS | Belfast Municipal to Fox Harbour |
| Venango Regional (FKL) | Franklin | PA | Belfast Municipal to Venango Regional |
| Franklin Municipal-John Beverly Rose (FKN) | Franklin | VA | Belfast Municipal to Franklin Municipal-John Beverly Rose |
| Fond Du Lac County (FLD) | Fond Du Lac | WI | Belfast Municipal to Fond Du Lac County |
| Fort Lauderdale Hollywood International (FLL) | Fort Lauderdale | FL | Belfast Municipal to Fort Lauderdale Hollywood International |
| Florence Regional (FLO) | Florence | SC | Belfast Municipal to Florence Regional |
| Marion County Regional (FLP) | Flippin | AR | Belfast Municipal to Marion County Regional |
| Sherman Army Airfield (FLV) | Fort Leavenworth | KS | Belfast Municipal to Sherman Army Airfield |
| Fort Meade (Odenton) Tipton (FME) | Fort Meade Odenton | MD | Belfast Municipal to Fort Meade (Odenton) Tipton |
| Fort Madison Municipal (FMS) | Fort Madison | IA | Belfast Municipal to Fort Madison Municipal |
| Page Field (FMY) | Fort Myers | FL | Belfast Municipal to Page Field |
| Bishop International (FNT) | Flint | MI | Belfast Municipal to Bishop International |
| Fort Dodge Regional (FOD) | Fort Dodge | IA | Belfast Municipal to Fort Dodge Regional |
| Topeka Regional (FOE) | Topeka | KS | Belfast Municipal to Topeka Regional |
| Francis S Gabreski (FOK) | Westhampton Beach | NY | Belfast Municipal to Francis S Gabreski |
| Grand Bahama International (FPO) | Freeport | | Belfast Municipal to Grand Bahama International |
| Treasure Coast International (FPR) | Fort Pierce | FL | Belfast Municipal to Treasure Coast International |
| Perry-Foley (FPY) | Perry | FL | Belfast Municipal to Perry-Foley |
| Republic Long Island (FRG) | Farmingdale | NY | Belfast Municipal to Republic Long Island |
| French Lick Municipal (FRH) | French Lick | IN | Belfast Municipal to French Lick Municipal |
| Fairmont Municipal (FRM) | Fairmont | MN | Belfast Municipal to Fairmont Municipal |
| Front Royal-Warren County (FRR) | Front Royal | VA | Belfast Municipal to Front Royal-Warren County |
| Eastern Slopes Regional (FRY) | Fryeburg | ME | Belfast Municipal to Eastern Slopes Regional |
| Sioux Falls Regional, Joe Foss Field (FSD) | Sioux Falls | SD | Belfast Municipal to Sioux Falls Regional, Joe Foss Field |
| Fort Scott Municipal (FSK) | Fort Scott | KS | Belfast Municipal to Fort Scott Municipal |
| Fort Smith Regional (FSM) | Fort Smith | AR | Belfast Municipal to Fort Smith Regional |
| Fort Worth Meacham International (FTW) | Fort Worth | TX | Belfast Municipal to Fort Worth Meacham International |
| Fulton County/Brown Field (FTY) | Atlanta | GA | Belfast Municipal to Fulton County/Brown Field |
| Fort Wayne International (FWA) | Fort Wayne | IN | Belfast Municipal to Fort Wayne International |
| Branson West Municipal - Emerson Field (FWB) | Branson West | MO | Belfast Municipal to Branson West Municipal - Emerson Field |
| Fort Lauderdale Executive (FXE) | Fort Lauderdale | FL | Belfast Municipal to Fort Lauderdale Executive |
| Forest City Municipal (FXY) | Forest City | IA | Belfast Municipal to Forest City Municipal |
| Fayetteville Municipal (FYM) | Fayetteville | TN | Belfast Municipal to Fayetteville Municipal |
| Drake Field (FYV) | Fayetteville | AR | Belfast Municipal to Drake Field |
| Northeast Alabama Regional (GAD) | Gadsden | AL | Belfast Municipal to Northeast Alabama Regional |
| Montgomery County Airpark (GAI) | Gaithersburg | MD | Belfast Municipal to Montgomery County Airpark |
| Great Bend Municipal (GBD) | Great Bend | KS | Belfast Municipal to Great Bend Municipal |
| Galesburg Municipal (GBG) | Galesburg | IL | Belfast Municipal to Galesburg Municipal |
| Gillette-Campbell County (GCC) | Gillette | WY | Belfast Municipal to Gillette-Campbell County |
| Garden City Regional (GCK) | Garden City | KS | Belfast Municipal to Garden City Regional |
| Greeneville-Greene County Municipal (GCY) | Greeneville | TN | Belfast Municipal to Greeneville-Greene County Municipal |
| Donaldson Field (GDC) | Greenville | SC | Belfast Municipal to Donaldson Field |
| Gardner Municipal (GDM) | Gardner | MA | Belfast Municipal to Gardner Municipal |
| Grand Turk (Jags Mccartney) Intl (GDT) | Grand Turk I | | Belfast Municipal to Grand Turk (Jags Mccartney) Intl |
| Dawson Community (GDV) | Glendive | MT | Belfast Municipal to Dawson Community |
| Gladwin Zettel Memorial (GDW) | Gladwin | MI | Belfast Municipal to Gladwin Zettel Memorial |
| Delaware Coastal (GED) | Georgetown | DE | Belfast Municipal to Delaware Coastal |
| Grand Forks International (GFK) | Grand Forks | ND | Belfast Municipal to Grand Forks International |
| Floyd Bennett Memorial (GFL) | Glens Falls | NY | Belfast Municipal to Floyd Bennett Memorial |
| Georgetown County (GGE) | Georgetown | SC | Belfast Municipal to Georgetown County |
| East Texas Regional (GGG) | Longview | TX | Belfast Municipal to East Texas Regional |
| Exuma International (GGT) | Exuma Islands | | Belfast Municipal to Exuma International |
| Wokal Field/Glasgow International (GGW) | Glasgow | MT | Belfast Municipal to Wokal Field/Glasgow International |
| Eleuthera Island/Governors Harbour Intl (GHB) | Eleuthera Island | | Belfast Municipal to Eleuthera Island/Governors Harbour Intl |
| Great Harbour Cay (GHC) | Berry Islands | | Belfast Municipal to Great Harbour Cay |
| Centerville Municipal (GHM) | Centerville | TN | Belfast Municipal to Centerville Municipal |
| Winter Haven Regional (GIF) | Winter Haven | FL | Belfast Municipal to Winter Haven Regional |
| Gatlinburg-Pigeon Forge (GKT) | Sevierville | TN | Belfast Municipal to Gatlinburg-Pigeon Forge |
| Renner Field/Goodland Municipal (GLD) | Goodland | KS | Belfast Municipal to Renner Field/Goodland Municipal |
| Gainesville Municipal (GLE) | Gainesville | TX | Belfast Municipal to Gainesville Municipal |
| Greenville Mid-Delta (GLH) | Greenville | MS | Belfast Municipal to Greenville Mid-Delta |
| Gaylord Regional (GLR) | Gaylord | MI | Belfast Municipal to Gaylord Regional |
| Scholes International at Galveston (GLS) | Galveston | TX | Belfast Municipal to Scholes International at Galveston |
| Glasgow Municipal (GLW) | Glasgow | KY | Belfast Municipal to Glasgow Municipal |
| Greenville Downtown (GMU) | Greenville | SC | Belfast Municipal to Greenville Downtown |
| Gainesville Regional (GNV) | Gainesville | FL | Belfast Municipal to Gainesville Regional |
| Guthrie-Edmond Regional (GOK) | Guthrie | OK | Belfast Municipal to Guthrie-Edmond Regional |
| Groton New London (GON) | Groton New London | CT | Belfast Municipal to Groton New London |
| Gulfport-Biloxi International (GPT) | Gulfport | MS | Belfast Municipal to Gulfport-Biloxi International |
| Grand Rapids/Itasca County-Gordon Newstrom Field (GPZ) | Grand Rapids | MN | Belfast Municipal to Grand Rapids/Itasca County-Gordon Newstrom Field |
| Galion Municipal (GQQ) | Galion | OH | Belfast Municipal to Galion Municipal |
| Austin Straubel International (GRB) | Green Bay | WI | Belfast Municipal to Austin Straubel International |
| Greenwood County (GRD) | Greenwood | SC | Belfast Municipal to Greenwood County |
| Greenville (GRE) | Greenville | IL | Belfast Municipal to Greenville |
| Central Nebraska Regional (GRI) | Grand Island | NE | Belfast Municipal to Central Nebraska Regional |
| Killeen/Fort Hood Regional/Robert Gray AAF (GRK) | Killeen | TX | Belfast Municipal to Killeen/Fort Hood Regional/Robert Gray AAF |
| Grand Marais/Cook County (GRM) | Grand Marais | MN | Belfast Municipal to Grand Marais/Cook County |
| Gordon Municipal (GRN) | Gordon | NE | Belfast Municipal to Gordon Municipal |
| Gerald R Ford International (GRR) | Grand Rapids | MI | Belfast Municipal to Gerald R Ford International |
| Goshen Municipal (GSH) | Goshen | IN | Belfast Municipal to Goshen Municipal |
| Piedmont Triad International (GSO) | Greensboro | NC | Belfast Municipal to Piedmont Triad International |
| Greenville Spartanburg International (GSP) | Greer | SC | Belfast Municipal to Greenville Spartanburg International |
| Golden Triangle Regional (GTR) | Columbus | MS | Belfast Municipal to Golden Triangle Regional |
| Gettysburg Regional (GTY) | Gettysburg | PA | Belfast Municipal to Gettysburg Regional |
| Jack Edwards National (GUF) | Gulf Shores | AL | Belfast Municipal to Jack Edwards National |
| Grissom Aeroplex/Arb (GUS) | Peru | IN | Belfast Municipal to Grissom Aeroplex/Arb |
| Guymon Municipal (GUY) | Guymon | OK | Belfast Municipal to Guymon Municipal |
| Lee Gilmer Memorial (GVL) | Gainesville | GA | Belfast Municipal to Lee Gilmer Memorial |
| Majors (GVT) | Greenville | TX | Belfast Municipal to Majors |
| Greenwood Leflore (GWO) | Greenwood | MS | Belfast Municipal to Greenwood Leflore |
| Greeley-Weld County (GXY) | Greeley | CO | Belfast Municipal to Greeley-Weld County |
| Gary/Chicago International (GYY) | GARY | IN | Belfast Municipal to Gary/Chicago International |
| Three Rivers Municipal Dr Haines (HAI) | Three Rivers | MI | Belfast Municipal to Three Rivers Municipal Dr Haines |
| Butler County Regional-Hogan Field (HAO) | Hamilton | OH | Belfast Municipal to Butler County Regional-Hogan Field |
| Capital City Harrisburg (HAR) | Harrisburg | PA | Belfast Municipal to Capital City Harrisburg |
| Hattiesburg Bobby L Chain Municipal (HBG) | Hattiesburg | MS | Belfast Municipal to Hattiesburg Bobby L Chain Municipal |
| Hobart Regional (HBR) | Hobart | OK | Belfast Municipal to Hobart Regional |
| Columbia County (HCC) | Hudson | NY | Belfast Municipal to Columbia County |
| Cheraw Municipal/Lynch Bellinger Field (HCW) | Cheraw | SC | Belfast Municipal to Cheraw Municipal/Lynch Bellinger Field |
| Brewster Field (HDE) | Holdrege | NE | Belfast Municipal to Brewster Field |
| Thompson-Robbins (HEE) | Helena/West Helena | AR | Belfast Municipal to Thompson-Robbins |
| Manassas Regional/Harry P Davis Field (HEF) | Manassas | VA | Belfast Municipal to Manassas Regional/Harry P Davis Field |
| Natchez-Adams County (Hardy-Anders Field) (HEZ) | Natchez | MS | Belfast Municipal to Natchez-Adams County (Hardy-Anders Field) |
| Hartford/Brainard (HFD) | Hartford | CT | Belfast Municipal to Hartford/Brainard |
| Richard A Henson Field/Hagerstown Regional (HGR) | Hagerstown | MD | Belfast Municipal to Richard A Henson Field/Hagerstown Regional |
| Hilton Head (HHH) | Hilton Head Island | SC | Belfast Municipal to Hilton Head |
| Range Regional (HIB) | Hibbing | MN | Belfast Municipal to Range Regional |
| Mount Washington Regional (HIE) | Whitefield | NH | Belfast Municipal to Mount Washington Regional |
| Blytheville Municipal (HKA) | Blytheville | AR | Belfast Municipal to Blytheville Municipal |
| Hawkins Field (HKS) | Jackson | MS | Belfast Municipal to Hawkins Field |
| Hickory Regional (HKY) | Hickory | NC | Belfast Municipal to Hickory Regional |
| Hill City Municipal (HLC) | Hill City | KS | Belfast Municipal to Hill City Municipal |
| Wheeling Ohio County (HLG) | Wheeling | WV | Belfast Municipal to Wheeling Ohio County |
| Park Township (HLM) | Holland | MI | Belfast Municipal to Park Township |
| Huntingburg (HNB) | Huntingburg | IN | Belfast Municipal to Huntingburg |
| Billy Mitchell (HNC) | Hatteras | NC | Belfast Municipal to Billy Mitchell |
| Huron Regional (HON) | Huron | SD | Belfast Municipal to Huron Regional |
| Memorial Field (HOT) | Hot Springs | AR | Belfast Municipal to Memorial Field |
| William P Hobby (HOU) | Houston | TX | Belfast Municipal to William P Hobby |
| Westchester County (HPN) | White Plains | NY | Belfast Municipal to Westchester County |
| Hampton Municipal (HPT) | Hampton | IA | Belfast Municipal to Hampton Municipal |
| Baytown (HPY) | Houston | TX | Belfast Municipal to Baytown |
| Boone County Regional (HRO) | Harrison | AR | Belfast Municipal to Boone County Regional |
| Harrisburg-Raleigh (HSB) | Harrisburg | IL | Belfast Municipal to Harrisburg-Raleigh |
| Hastings Municipal (HSI) | Hastings | NE | Belfast Municipal to Hastings Municipal |
| Ingalls Field (HSP) | Hot Springs | VA | Belfast Municipal to Ingalls Field |
| Huntsville International/Carl T Jones Field (HSV) | Huntsville | AL | Belfast Municipal to Huntsville International/Carl T Jones Field |
| Roscommon County - Blodgett Memorial (HTL) | Houghton Lake | MI | Belfast Municipal to Roscommon County - Blodgett Memorial |
| East Hampton (JPX) | East Hampton | NY | Belfast Municipal to East Hampton |
| Tri-State Milton J Ferguson Field (HTS) | Huntington | WV | Belfast Municipal to Tri-State Milton J Ferguson Field |
| Huntsville Municipal (HTV) | Huntsville | TX | Belfast Municipal to Huntsville Municipal |
| Lawrence County Airpark (HTW) | Chesapeake | OH | Belfast Municipal to Lawrence County Airpark |
| Terre Haute Regional (HUF) | Terre Haute | IN | Belfast Municipal to Terre Haute Regional |
| Stan Stamper Municipal (HUJ) | Hugo | OK | Belfast Municipal to Stan Stamper Municipal |
| Houlton International (HUL) | Houlton | ME | Belfast Municipal to Houlton International |
| Houma-Terrebonne (HUM) | Houma | LA | Belfast Municipal to Houma-Terrebonne |
| Hutchinson Regional (HUT) | Hutchinson | KS | Belfast Municipal to Hutchinson Regional |
| Tweed/New Haven (HVN) | New Haven | CT | Belfast Municipal to Tweed/New Haven |
| Hartsville Regional (HVS) | Hartsville | SC | Belfast Municipal to Hartsville Regional |
| Barnstable Municipal/Boardman-Polando Field (HYA) | Hyannis | MA | Belfast Municipal to Barnstable Municipal/Boardman-Polando Field |
| Sawyer County (HYR) | Hayward | WI | Belfast Municipal to Sawyer County |
| Hays Regional (HYS) | Hays | KS | Belfast Municipal to Hays Regional |
| Hazleton Regional (HZL) | Hazleton | PA | Belfast Municipal to Hazleton Regional |
| Washington Dulles International (IAD) | Washington | VA | Belfast Municipal to Washington Dulles International |
| Niagara Falls International (IAG) | Niagara Falls | NY | Belfast Municipal to Niagara Falls International |
| George Bush Intercontinental Houston (IAH) | Houston | TX | Belfast Municipal to George Bush Intercontinental Houston |
| Schenck Field (ICL) | Clarinda | IA | Belfast Municipal to Schenck Field |
| Wichita Eisenhower National (ICT) | Wichita | KS | Belfast Municipal to Wichita Eisenhower National |
| Indiana County/Jimmy Stewart Field (IDI) | Indiana | PA | Belfast Municipal to Indiana County/Jimmy Stewart Field |
| Independence Municipal (IDP) | Independence | KS | Belfast Municipal to Independence Municipal |
| Iowa Falls Municipal (IFA) | Iowa Falls | IA | Belfast Municipal to Iowa Falls Municipal |
| Jacksonville Municipal (IJX) | Jacksonville | IL | Belfast Municipal to Jacksonville Municipal |
| Wilkes County (IKB) | N Wilkesboro | NC | Belfast Municipal to Wilkes County |
| Greater Kankakee (IKK) | Kankakee | IL | Belfast Municipal to Greater Kankakee |
| Skylark Field Killeen (ILE) | Killeen | TX | Belfast Municipal to Skylark Field Killeen |
| Wilmington/New Castle (ILG) | Wilmington | DE | Belfast Municipal to Wilmington/New Castle |
| Willmar Municipal/John L Rice Field (ILL) | Willmar | MN | Belfast Municipal to Willmar Municipal/John L Rice Field |
| Wilmington International (ILM) | Wilmington | NC | Belfast Municipal to Wilmington International |
| Wilmington Airpark (ILN) | Wilmington | OH | Belfast Municipal to Wilmington Airpark |
| Immokalee Regional (IMM) | Immokalee | FL | Belfast Municipal to Immokalee Regional |
| Ford (IMT) | Iron Mountain | MI | Belfast Municipal to Ford |
| Indianapolis International (IND) | Indianapolis | IN | Belfast Municipal to Indianapolis International |
| Falls Intl-Einarson Field (INL) | International Falls | MN | Belfast Municipal to Falls Intl-Einarson Field |
| Smith Reynolds (INT) | Winston-Salem | NC | Belfast Municipal to Smith Reynolds |
| Iowa City Municipal (IOW) | Iowa City | IA | Belfast Municipal to Iowa City Municipal |
| Williamsport Regional (IPT) | Williamsport | PA | Belfast Municipal to Williamsport Regional |
| Kirksville Regional (IRK) | Kirksville | MO | Belfast Municipal to Kirksville Regional |
| Kirsch Municipal (IRS) | Sturgis | MI | Belfast Municipal to Kirsch Municipal |
| Kissimmee Gateway (ISM) | Orlando | FL | Belfast Municipal to Kissimmee Gateway |
| Williston/Sloulin Field International (ISN) | Williston | ND | Belfast Municipal to Williston/Sloulin Field International |
| Kinston Regional Jetport Stallings Field (ISO) | Kinston | NC | Belfast Municipal to Kinston Regional Jetport Stallings Field |
| Long Island Macarthur (ISP) | Islip | NY | Belfast Municipal to Long Island Macarthur |
| Schoolcraft County (ISQ) | Manistique | MI | Belfast Municipal to Schoolcraft County |
| Alexander Field South Wood County (ISW) | Wisconsin Rapids | WI | Belfast Municipal to Alexander Field South Wood County |
| Ithaca Tompkins Regional (ITH) | Ithaca | NY | Belfast Municipal to Ithaca Tompkins Regional |
| Gogebic-Iron County (IWD) | Ironwood | MI | Belfast Municipal to Gogebic-Iron County |
| Jackson/Evers International (JAN) | Jackson | MS | Belfast Municipal to Jackson/Evers International |
| Jasper County-Bell Field (JAS) | Jasper | TX | Belfast Municipal to Jasper County-Bell Field |
| Jacksonville International (JAX) | Jacksonville | FL | Belfast Municipal to Jacksonville International |
| Jonesboro Municipal (JBR) | Jonesboro | AR | Belfast Municipal to Jonesboro Municipal |
| New Century Aircenter (JCI) | Olathe | KS | Belfast Municipal to New Century Aircenter |
| Jordan (JDN) | Jordan | MT | Belfast Municipal to Jordan |
| Jefferson City Memorial (JEF) | Jefferson City | MO | Belfast Municipal to Jefferson City Memorial |
| New York/John F Kennedy International (JFK) | New York | NY | Belfast Municipal to New York/John F Kennedy International |
| Northeast Ohio Regional (JFN) | Ashtabula | OH | Belfast Municipal to Northeast Ohio Regional |
| Chautauqua County/Jamestown (JHW) | Jamestown | NY | Belfast Municipal to Chautauqua County/Jamestown |
| Cherokee County (JKV) | Jacksonville | TX | Belfast Municipal to Cherokee County |
| Joplin Regional (JLN) | Joplin | MO | Belfast Municipal to Joplin Regional |
| Jamestown Regional (JMS) | Jamestown | ND | Belfast Municipal to Jamestown Regional |
| Joliet Regional Airport (JOT) | Joliet | IL | Belfast Municipal to Joliet Regional Airport |
| John Murtha Johnstown/Cambria County (JST) | Johnstown | PA | Belfast Municipal to John Murtha Johnstown/Cambria County |
| Central Jersey Regional (JVI) | Manville | NJ | Belfast Municipal to Central Jersey Regional |
| Souther Wisconsin Regional (JVL) | Janesville | WI | Belfast Municipal to Souther Wisconsin Regional |
| Jackson County/Reynolds Field (JXN) | Jackson | MI | Belfast Municipal to Jackson County/Reynolds Field |
| Williams County (K0G6) | Bryan | OH | Belfast Municipal to Williams County |
| Finger Lakes Regional (K0G7) | Seneca Falls | NY | Belfast Municipal to Finger Lakes Regional |
| Brenham Municipal (K11) | Brenham | TX | Belfast Municipal to Brenham Municipal |
| Camden County (K19N) | Berlin | NJ | Belfast Municipal to Camden County |
| Mansfield Municipal (K1B9) | Mansfield | MA | Belfast Municipal to Mansfield Municipal |
| Wood County Regional (K1G0) | Bowling Green | OH | Belfast Municipal to Wood County Regional |
| Kent State University (K1G3) | Kent | OH | Belfast Municipal to Kent State University |
| Medina Municipal (K1G5) | Medina | OH | Belfast Municipal to Medina Municipal |
| Creve Coeur (K1H0) | St Louis | MO | Belfast Municipal to Creve Coeur |
| Skaneateles (K6B9) | Skaneateles | NY | Belfast Municipal to Skaneateles |
| Northampton (K7B2) | Northampton | MA | Belfast Municipal to Northampton |
| Skylark Airpark (K7B6) | Warehouse Point | CT | Belfast Municipal to Skylark Airpark |
| Bearce (K7M3) | Mount Ida | AR | Belfast Municipal to Bearce |
| Paul C. Miller-Sparta (K8D4) | Sparta | MI | Belfast Municipal to Paul C. Miller-Sparta |
| Wichita Col James Jabara (KAAO) | Wichita | KS | Belfast Municipal to Wichita Col James Jabara |
| Anoka County-Blaine (Janes Field) (KANE) | Minneapolis | MN | Belfast Municipal to Anoka County-Blaine (Janes Field) |
| Slidell (KASD) | Slidell | LA | Belfast Municipal to Slidell |
| Huron County Memorial (KBAX) | Bad Axe | MI | Belfast Municipal to Huron County Memorial |
| Brooksville-Tampa Bay Regional (KBKV) | Brooksville | FL | Belfast Municipal to Brooksville-Tampa Bay Regional |
| Buffalo-Lancaster Regional (KBQR) | Lancaster | NY | Belfast Municipal to Buffalo-Lancaster Regional |
| Burlington Municipal (KBUU) | Burlington | WI | Belfast Municipal to Burlington Municipal |
| Burlington-Alamance Regional (KBUY) | Burlington | NC | Belfast Municipal to Burlington-Alamance Regional |
| Newnan Coweta County (KCCO) | Atlanta | GA | Belfast Municipal to Newnan Coweta County |
| Cambridge Municipal (KCDI) | Cambridge | OH | Belfast Municipal to Cambridge Municipal |
| Front Range (KCFO) | Denver | CO | Belfast Municipal to Front Range |
| Crystal River (KCGC) | Crystal River | FL | Belfast Municipal to Crystal River |
| Pennridge (KCKZ) | Perkasie | PA | Belfast Municipal to Pennridge |
| Cherokee County Regional (KCNI) | Canton | GA | Belfast Municipal to Cherokee County Regional |
| Chesapeake Regional (KCPK) | Norfolk | VA | Belfast Municipal to Chesapeake Regional |
| Chatham Municipal (KCQX) | Chatham | MA | Belfast Municipal to Chatham Municipal |
| West Georgia Regional - O V Gray Field (KCTJ) | Carrollton | GA | Belfast Municipal to West Georgia Regional - O V Gray Field |
| Custer County (KCUT) | Custer | SD | Belfast Municipal to Custer County |
| Charlevoix Municipal (KCVX) | Charlevoix | MI | Belfast Municipal to Charlevoix Municipal |
| Manitowish Waters (KD25) | Manitowish Waters | WI | Belfast Municipal to Manitowish Waters |
| Skyhaven (KDAW) | Rochester | NH | Belfast Municipal to Skyhaven |
| Chester Catawba Regional (KDCM) | Chester | SC | Belfast Municipal to Chester Catawba Regional |
| Bennington/William H. Morse State (KDDH) | Bennington | VT | Belfast Municipal to Bennington/William H. Morse State |
| Knoxville Downtown Island (KDKX) | Knoxville | TN | Belfast Municipal to Knoxville Downtown Island |
| Carroll County Regional/Jack B Poage Field (KDMW) | Westminster | MD | Belfast Municipal to Carroll County Regional/Jack B Poage Field |
| Kenansville/Duplin County (KDPL) | Kenansville | NC | Belfast Municipal to Kenansville/Duplin County |
| Toledo Suburban (KDUH) | Lambertville | MI | Belfast Municipal to Toledo Suburban |
| Austin Executive (KEDC) | Austin | TX | Belfast Municipal to Austin Executive |
| Mitchell Field Bessemer (KEKY) | Bessemer | AL | Belfast Municipal to Mitchell Field Bessemer |
| Davidson County (KEXX) | Lexington | NC | Belfast Municipal to Davidson County |
| Eagle Creek Airpark (KEYE) | Indianapolis | IN | Belfast Municipal to Eagle Creek Airpark |
| Kewanee Municipal (KEZI) | Kewanee | IL | Belfast Municipal to Kewanee Municipal |
| North Palm Beach County General Aviation (KF45) | West Palm Beach | FL | Belfast Municipal to North Palm Beach County General Aviation |
| Atlanta Regional/Falcon Field (KFFC) | Atlanta | GA | Belfast Municipal to Atlanta Regional/Falcon Field |
| Fernandina Beach Municipal (KFHB) | Fernandina Beach | FL | Belfast Municipal to Fernandina Beach Municipal |
| Genesee County (KGVQ) | Batavia | NY | Belfast Municipal to Genesee County |
| Hammond Northshore Regional (KHDC) | Hammond | LA | Belfast Municipal to Hammond Northshore Regional |
| Hornell Municipal (KHTF) | Hornell | NY | Belfast Municipal to Hornell Municipal |
| Ortner (KI64) | Wakeman | OH | Belfast Municipal to Ortner |
| Breckinridge County (KI93) | Hardinsburg | KY | Belfast Municipal to Breckinridge County |
| Kickapoo Downtown (KIP) | Wichita Falls | TX | Belfast Municipal to Kickapoo Downtown |
| Canandaigua (KIUA) | Canandaigua | NY | Belfast Municipal to Canandaigua |
| Wabash Municipal (KIWH) | Wabash | IN | Belfast Municipal to Wabash Municipal |
| Williamsburg-Jamestown (KJGG) | Williamsburg | VA | Belfast Municipal to Williamsburg-Jamestown |
| John C Tune (KJWN) | Nashville | TN | Belfast Municipal to John C Tune |
| Leesburg Executive (KJYO) | Leesburg | VA | Belfast Municipal to Leesburg Executive |
| Charleston Executive (KJZI) | Charleston | SC | Belfast Municipal to Charleston Executive |
| Gene Snyder (KK62) | Falmouth | KY | Belfast Municipal to Gene Snyder |
| Kentland Municipal (KKT) | Kentland | IN | Belfast Municipal to Kentland Municipal |
| Lancaster Regional (KLNC) | Lancaster | TX | Belfast Municipal to Lancaster Regional |
| Mt Pleasant Regional-Faison Field (KLRO) | Mount Pleasant | SC | Belfast Municipal to Mt Pleasant Regional-Faison Field |
| South Haven Area Regional (KLWA) | South Haven | MI | Belfast Municipal to South Haven Area Regional |
| Lee's Summit Municipal (KLXT) | Lee's Summit | MO | Belfast Municipal to Lee's Summit Municipal |
| Harbor Springs (KMGN) | Harbor Springs | MI | Belfast Municipal to Harbor Springs |
| Metter Municipal (KMHP) | Metter | GA | Belfast Municipal to Metter Municipal |
| Mountain Empire (KMKJ) | Marion-Wythevil | VA | Belfast Municipal to Mountain Empire |
| Pike County-Hatcher Field (KPBX) | Pikeville | KY | Belfast Municipal to Pike County-Hatcher Field |
| Penn Yan (KPEO) | Penn Yan | NY | Belfast Municipal to Penn Yan |
| Platteville Municipal (KPVB) | Platteville | WI | Belfast Municipal to Platteville Municipal |
| Stafford Regional (KRMN) | Stafford | VA | Belfast Municipal to Stafford Regional |
| Cobb County International-McCollum Field (KRYY) | Atlanta | GA | Belfast Municipal to Cobb County International-McCollum Field |
| Saline County Regional (KSUZ) | Benton | AR | Belfast Municipal to Saline County Regional |
| Mason Jewett Field (KTEW) | Mason | MI | Belfast Municipal to Mason Jewett Field |
| Mckinney National (KTKI) | McKinney | TX | Belfast Municipal to Mckinney National |
| Houston Executive (KTME) | Houston | TX | Belfast Municipal to Houston Executive |
| Centerville Municipal (KTVK) | Centerville | IA | Belfast Municipal to Centerville Municipal |
| Indianapolis Executive (KTYQ) | Indianapolis | IN | Belfast Municipal to Indianapolis Executive |
| Indianapolis Metropolitan (KUMP) | Indianapolis | IN | Belfast Municipal to Indianapolis Metropolitan |
| Bentonville Municipal/Louise M Thaden Field (KVBT) | Bentonville | AR | Belfast Municipal to Bentonville Municipal/Louise M Thaden Field |
| Tampa Executive (KVDF) | Tampa | FL | Belfast Municipal to Tampa Executive |
| Hamilton Municipal (KVGC) | Hamilton | NY | Belfast Municipal to Hamilton Municipal |
| Oakland/Troy (KVLL) | Troy | MI | Belfast Municipal to Oakland/Troy |
| Washington Executive/Hyde Field (KW32) | Clinton | MD | Belfast Municipal to Washington Executive/Hyde Field |
| Ocracoke Island Airport (KW95) | Ocracoke | NC | Belfast Municipal to Ocracoke Island Airport |
| Allentown Queen City Municipal (KXLL) | Allentown | PA | Belfast Municipal to Allentown Queen City Municipal |
| Lamar Municipal (LAA) | Lamar | CO | Belfast Municipal to Lamar Municipal |
| Purdue University (LAF) | Lafayette | IN | Belfast Municipal to Purdue University |
| Lakeland Linder International (LAL) | Lakeland | FL | Belfast Municipal to Lakeland Linder International |
| Capital Region International (LAN) | Lansing | MI | Belfast Municipal to Capital Region International |
| Fort Sill Regional Lawton (LAW) | Lawton | OK | Belfast Municipal to Fort Sill Regional Lawton |
| Arnold Palmer Regional (LBE) | Latrobe | PA | Belfast Municipal to Arnold Palmer Regional |
| North Platte Regional/Lee Bird Field (LBF) | North Platte | NE | Belfast Municipal to North Platte Regional/Lee Bird Field |
| Liberal Mid-America Regional (LBL) | Liberal | KS | Belfast Municipal to Liberal Mid-America Regional |
| Lumberton Regional (LBT) | Lumberton | NC | Belfast Municipal to Lumberton Regional |
| Lake Charles Regional (LCH) | Lake Charles | LA | Belfast Municipal to Lake Charles Regional |
| Laconia Municipal (LCI) | Laconia | NH | Belfast Municipal to Laconia Municipal |
| Rickenbacker International (LCK) | Columbus | OH | Belfast Municipal to Rickenbacker International |
| Linden (LDJ) | Linden | NJ | Belfast Municipal to Linden |
| Mason County (LDM) | Ludington | MI | Belfast Municipal to Mason County |
| Lebanon Municipal (LEB) | Lebanon | NH | Belfast Municipal to Lebanon Municipal |
| Leesburg International (LEE) | Leesburg | FL | Belfast Municipal to Leesburg International |
| Lemmon Municipal (LEM) | Lemmon | SD | Belfast Municipal to Lemmon Municipal |
| Blue Grass (LEX) | Lexington | KY | Belfast Municipal to Blue Grass |
| Angelina County (LFK) | Lufkin | TX | Belfast Municipal to Angelina County |
| Triangle North Executive (LFN) | Louisburg | NC | Belfast Municipal to Triangle North Executive |
| Lafayette Regional (LFT) | Lafayette | LA | Belfast Municipal to Lafayette Regional |
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