| Apalachicola Regional (AAF) | Apalachicola | FL | Niagara Central to Apalachicola Regional |
| Lehigh Valley International (ABE) | Allentown | PA | Niagara Central to Lehigh Valley International |
| Aberdeen Regional (ABR) | Aberdeen | SD | Niagara Central to Aberdeen Regional |
| Southwest Georgia Regional (ABY) | Albany | GA | Niagara Central to Southwest Georgia Regional |
| Antrim County (ACB) | Bellaire | MI | Niagara Central to Antrim County |
| Nantucket Memorial (ACK) | Nantucket | MA | Niagara Central to Nantucket Memorial |
| Atlantic City International (ACY) | Atlantic City | NJ | Niagara Central to Atlantic City International |
| Lenawee County (ADG) | Adrian | MI | Niagara Central to Lenawee County |
| Ardmore Municipal (ADM) | Ardmore | OK | Niagara Central to Ardmore Municipal |
| Robert F Swinnie (ADR) | Andrews | SC | Niagara Central to Robert F Swinnie |
| Ada Municipal (ADT) | Ada | OK | Niagara Central to Ada Municipal |
| Albert Lea Municipal (AEL) | Albert Lea | MN | Niagara Central to Albert Lea Municipal |
| Alexandria International (AEX) | Alexandria | LA | Niagara Central to Alexandria International |
| Allegheny County (AGC) | Pittsburgh | PA | Niagara Central to Allegheny County |
| Magnolia Municipal (AGO) | Magnolia | AR | Niagara Central to Magnolia Municipal |
| Augusta Regional/Bush Field (AGS) | Augusta | GA | Niagara Central to Augusta Regional/Bush Field |
| Ardmore Downtown Executive (AHD) | Ardmore | OK | Niagara Central to Ardmore Downtown Executive |
| Arapahoe Municipal (AHF) | Arapahoe | NE | Niagara Central to Arapahoe Municipal |
| Amery Municipal (AHH) | Amery | WI | Niagara Central to Amery Municipal |
| Athens/Ben Epps (AHN) | Athens | GA | Niagara Central to Athens/Ben Epps |
| Anderson Municipal-Darlington Field (AID) | Anderson | IN | Niagara Central to Anderson Municipal-Darlington Field |
| Aiken Regional (AIK) | Aiken | SC | Niagara Central to Aiken Regional |
| Atlantic Municipal (AIO) | Atlantic | IA | Niagara Central to Atlantic Municipal |
| George Downer (AIV) | Aliceville | AL | Niagara Central to George Downer |
| Lee C Fine Memorial (AIZ) | KAISER/LAKE OZARK | MO | Niagara Central to Lee C Fine Memorial |
| Akron Fulton International (AKC) | Akron | OH | Niagara Central to Akron Fulton International |
| Albany International (ALB) | Albany | NY | Niagara Central to Albany International |
| St Louis Regional (ALN) | Alton | IL | Niagara Central to St Louis Regional |
| Waterloo Regional (ALO) | Waterloo | IA | Niagara Central to Waterloo Regional |
| Thomas C Russell Field (ALX) | Alexander City | AL | Niagara Central to Thomas C Russell Field |
| Gratiot Community (AMN) | Alma | MI | Niagara Central to Gratiot Community |
| Ames Municipal (AMW) | Ames | IA | Niagara Central to Ames Municipal |
| Anniston Regional (ANB) | Anniston | AL | Niagara Central to Anniston Regional |
| Anderson Regional (AND) | Anderson | SC | Niagara Central to Anderson Regional |
| Tri-State Steuben County (ANQ) | Angola | IN | Niagara Central to Tri-State Steuben County |
| Ainsworth Regional (ANW) | Ainsworth | NE | Niagara Central to Ainsworth Regional |
| Anthony Municipal (ANY) | Anthony | KS | Niagara Central to Anthony Municipal |
| Lima Allen County (AOH) | Lima | OH | Niagara Central to Lima Allen County |
| Altoona/Blair County (AOO) | Altoona | PA | Niagara Central to Altoona/Blair County |
| Alpena County Regional (APN) | Alpena | MI | Niagara Central to Alpena County Regional |
| Marion County-Brown Field (APT) | Jasper | TN | Niagara Central to Marion County-Brown Field |
| New Iberia/Acadiana Regional (ARA) | New Iberia | LA | Niagara Central to New Iberia/Acadiana Regional |
| Ann Arbor Municipal (ARB) | Ann Arbor | MI | Niagara Central to Ann Arbor Municipal |
| Walnut Ridge Regional (ARG) | Walnut Ridge | AR | Niagara Central to Walnut Ridge Regional |
| Watertown International (ART) | Watertown | NY | Niagara Central to Watertown International |
| Lakeland/Noble F. Lee Memorial Field (ARV) | Minocqua | WI | Niagara Central to Lakeland/Noble F. Lee Memorial Field |
| Nashua-Boire Field (ASH) | Nashua | NH | Niagara Central to Nashua-Boire Field |
| Harrison County (ASL) | Marshall | TX | Niagara Central to Harrison County |
| Talladega Municipal (ASN) | Talladega | AL | Niagara Central to Talladega Municipal |
| John F Kennedy Memorial (ASX) | Ashland | WI | Niagara Central to John F Kennedy Memorial |
| Ashley Municipal (ASY) | Ashley | ND | Niagara Central to Ashley Municipal |
| Antlers Municipal (ATE) | Antlers | OK | Niagara Central to Antlers Municipal |
| Hartsfield Jackson Atlanta International (ATL) | Atlanta | GA | Niagara Central to Hartsfield Jackson Atlanta International |
| Gordon K Bush Ohio University (ATO) | Athens/Albany | OH | Niagara Central to Gordon K Bush Ohio University |
| Appleton International (ATW) | Appleton | WI | Niagara Central to Appleton International |
| Watertown Regional (ATY) | Watertown | SD | Niagara Central to Watertown Regional |
| Augusta State (AUG) | Augusta | ME | Niagara Central to Augusta State |
| Austin Municipal (AUM) | Austin | MN | Niagara Central to Austin Municipal |
| Auburn University Regional (AUO) | Auburn | AL | Niagara Central to Auburn University Regional |
| Wausau Downtown (AUW) | Wausau | WI | Niagara Central to Wausau Downtown |
| Chicago/Aurora Municipal (AUZ) | Chicago | IL | Niagara Central to Chicago/Aurora Municipal |
| Asheville Regional (AVL) | Asheville | NC | Niagara Central to Asheville Regional |
| Avon Park Executive (AVO) | Avon Park | FL | Niagara Central to Avon Park Executive |
| Wilkes-Barre/Scranton International (AVP) | Scranton | PA | Niagara Central to Wilkes-Barre/Scranton International |
| West Memphis Municipal (AWM) | West Memphis | AR | Niagara Central to West Memphis Municipal |
| Algona Municipal (AXG) | Algona | IA | Niagara Central to Algona Municipal |
| Chandler Field (AXN) | Alexandria | MN | Niagara Central to Chandler Field |
| Auglaize County Neil Armstrong (AXV) | Wapakoneta | OH | Niagara Central to Auglaize County Neil Armstrong |
| Waycross-Ware County (AYS) | Waycross | GA | Niagara Central to Waycross-Ware County |
| Kalamazoo/Battle Creek International (AZO) | Kalamazoo | MI | Niagara Central to Kalamazoo/Battle Creek International |
| Barnes Municipal (BAF) | Westfield | MA | Niagara Central to Barnes Municipal |
| Benson Municipal (BBB) | Benson | MN | Niagara Central to Benson Municipal |
| Broken Bow Municipal/Keith Glaze Field (BBW) | Broken Bow | NE | Niagara Central to Broken Bow Municipal/Keith Glaze Field |
| Wings Field (BBX) | Philadelphia | PA | Niagara Central to Wings Field |
| Virginia Tech Montgomery Executive (BCB) | Blacksburg | VA | Niagara Central to Virginia Tech Montgomery Executive |
| Boca Raton (BCT) | Boca Raton | FL | Niagara Central to Boca Raton |
| Baudette International (BDE) | Baudette | MN | Niagara Central to Baudette International |
| Bradley International (BDL) | Windsor Locks | CT | Niagara Central to Bradley International |
| Igor I Sikorsky Memorial (BDR) | Bridgeport | CT | Niagara Central to Igor I Sikorsky Memorial |
| Beech Factory (BEC) | Wichita | KS | Niagara Central to Beech Factory |
| Laurence G Hanscom Field (BED) | Bedford | MA | Niagara Central to Laurence G Hanscom Field |
| Southwest Michigan Regional (BEH) | Benton Harbor | MI | Niagara Central to Southwest Michigan Regional |
| Mobile Downtown (BFM) | Mobile | AL | Niagara Central to Mobile Downtown |
| Beaver County (BFP) | Beaver Falls | PA | Niagara Central to Beaver County |
| Virgil I Grissom Municipal (BFR) | Bedford | IN | Niagara Central to Virgil I Grissom Municipal |
| Beaufort County (BFT) | Beaufort | SC | Niagara Central to Beaufort County |
| Decatur County Industrial Air Park (BGE) | Bainbridge | GA | Niagara Central to Decatur County Industrial Air Park |
| Greater Binghamton Edwin A Link Field (BGM) | Binghamton | NY | Niagara Central to Greater Binghamton Edwin A Link Field |
| Bangor International (BGR) | Bangor | ME | Niagara Central to Bangor International |
| Hancock County-Bar Harbor (BHB) | Bar Harbor | ME | Niagara Central to Hancock County-Bar Harbor |
| Birmingham-Shuttlesworth International (BHM) | Birmingham | AL | Niagara Central to Birmingham-Shuttlesworth International |
| Beatrice Municipal (BIE) | Beatrice | NE | Niagara Central to Beatrice Municipal |
| Bismarck Municipal (BIS) | Bismarck | ND | Niagara Central to Bismarck Municipal |
| Bemidji Regional (BJI) | Bemidji | MN | Niagara Central to Bemidji Regional |
| Wayne County (BJJ) | Wooster | OH | Niagara Central to Wayne County |
| Branson (BKG) | Branson | MO | Niagara Central to Branson |
| Burke Lakefront (BKL) | Cleveland | OH | Niagara Central to Burke Lakefront |
| Allen C Perkinson Blackstone Army Air Field (BKT) | Blackstone | VA | Niagara Central to Allen C Perkinson Blackstone Army Air Field |
| Raleigh County Memorial (BKW) | Beckley | WV | Niagara Central to Raleigh County Memorial |
| Brookings Regional (BKX) | Brookings | SD | Niagara Central to Brookings Regional |
| Mercer County (BLF) | Bluefield | WV | Niagara Central to Mercer County |
| Monmouth Executive (BLM) | Belmar | NJ | Niagara Central to Monmouth Executive |
| MidAmerica St Louis Scott AFB (BLV) | Belleville | IL | Niagara Central to MidAmerica St Louis Scott AFB |
| Monroe County (BMG) | Bloomington | IN | Niagara Central to Monroe County |
| Central Illinois Regional at Bloomington Normal (BMI) | Bloomington | IL | Niagara Central to Central Illinois Regional at Bloomington Normal |
| Berlin Regional (BML) | Berlin | NH | Niagara Central to Berlin Regional |
| Nashville International (BNA) | Nashville | TN | Niagara Central to Nashville International |
| Barnwell Regional (BNL) | Barnwell | SC | Niagara Central to Barnwell Regional |
| Boone Municipal (BNW) | Boone | IA | Niagara Central to Boone Municipal |
| Boston Logan International (BOS) | Boston | MA | Niagara Central to Boston Logan International |
| Bartow Executive (BOW) | Bartow | FL | Niagara Central to Bartow Executive |
| Brunswick Golden Isles (BQK) | Brunswick | GA | Niagara Central to Brunswick Golden Isles |
| Brainerd Lakes Regional (BRD) | Brainerd | MN | Niagara Central to Brainerd Lakes Regional |
| Southeast Iowa Regional (BRL) | Burlington | IA | Niagara Central to Southeast Iowa Regional |
| Samuels Field (BRY) | Bardstown | KY | Niagara Central to Samuels Field |
| Battle Creek Executive (BTL) | Battle Creek | MI | Niagara Central to Battle Creek Executive |
| Marlboro County Jetport - H.E. Avent Field (BTN) | Bennettsville | SC | Niagara Central to Marlboro County Jetport - H.E. Avent Field |
| Pittsburgh/Butler Regional Airport (BTP) | Butler | PA | Niagara Central to Pittsburgh/Butler Regional Airport |
| Baton Rouge Metro Ryan Field (BTR) | Baton Rouge | LA | Niagara Central to Baton Rouge Metro Ryan Field |
| Burlington International (BTV) | Burlington | VT | Niagara Central to Burlington International |
| Cram Field (BUB) | Burwell | NE | Niagara Central to Cram Field |
| Butler Memorial (BUM) | Butler | MO | Niagara Central to Butler Memorial |
| Bartlesville Municipal (BVO) | Bartlesville | OK | Niagara Central to Bartlesville Municipal |
| Batesville Regional (BVX) | Batesville | AR | Niagara Central to Batesville Regional |
| Beverly Regional (BVY) | Beverly | MA | Niagara Central to Beverly Regional |
| Bowling Green Warren County Regional (BWG) | Bowling Green | KY | Niagara Central to Bowling Green Warren County Regional |
| Baltimore/Washington Intl Thurgood Marshall (BWI) | Baltimore | MD | Niagara Central to Baltimore/Washington Intl Thurgood Marshall |
| George R Carr Memorial Airfield (BXA) | Bogalusa | LA | Niagara Central to George R Carr Memorial Airfield |
| Arkansas International (BYH) | Blytheville | AR | Niagara Central to Arkansas International |
| Wexford County (CAD) | Cadillac | MI | Niagara Central to Wexford County |
| Columbia Metropolitan (CAE) | Columbia | SC | Niagara Central to Columbia Metropolitan |
| Akron/Canton Regional (CAK) | Akron | OH | Niagara Central to Akron/Canton Regional |
| Caribou Municipal (CAR) | Caribou | ME | Niagara Central to Caribou Municipal |
| Greater Cumberland Regional (CBE) | Cumberland | MD | Niagara Central to Greater Cumberland Regional |
| Council Bluffs Municipal (CBF) | Council Bluffs | IA | Niagara Central to Council Bluffs Municipal |
| Clinton Municipal (CCA) | Clinton | AR | Niagara Central to Clinton Municipal |
| Northeast Iowa Regional (CCY) | Charles City | IA | Niagara Central to Northeast Iowa Regional |
| Harrell Field (CDH) | Camden | AR | Niagara Central to Harrell Field |
| Woodward Field (CDN) | Camden | SC | Niagara Central to Woodward Field |
| Essex County (CDW) | Caldwell | NJ | Niagara Central to Essex County |
| Juniper (CE3) | Juniper | NB | Niagara Central to Juniper |
| Cessna Aircraft Field (CEA) | Wichita | KS | Niagara Central to Cessna Aircraft Field |
| Westover Arb/Westover Metropolitan (CEF) | Chicopee | MA | Niagara Central to Westover Arb/Westover Metropolitan |
| Oconee County Regional (CEU) | Clemson | SC | Niagara Central to Oconee County Regional |
| Mettel Field (CEV) | Connersville | IN | Niagara Central to Mettel Field |
| Bob Sikes (CEW) | Crestview | FL | Niagara Central to Bob Sikes |
| Kyle-Oakley Field (CEY) | Murray | KY | Niagara Central to Kyle-Oakley Field |
| Coffeyville Municipal (CFV) | Coffeyville | KS | Niagara Central to Coffeyville Municipal |
| Cambridge-Dorchester Regional (CGE) | Cambridge | MD | Niagara Central to Cambridge-Dorchester Regional |
| Cuyahoga County (CGF) | Cleveland | OH | Niagara Central to Cuyahoga County |
| Cape Girardeau Regional (CGI) | Cape Girardeau | MO | Niagara Central to Cape Girardeau Regional |
| Lovell Field (CHA) | Chattanooga | TN | Niagara Central to Lovell Field |
| Chickasha Municipal (CHK) | Chickasha | OK | Niagara Central to Chickasha Municipal |
| Charlottesville Albemarle (CHO) | Charlottesville | VA | Niagara Central to Charlottesville Albemarle |
| Charleston International (CHS) | Charleston | SC | Niagara Central to Charleston International |
| The Eastern Iowa (CID) | Cedar Rapids | IA | Niagara Central to The Eastern Iowa |
| Arthur N Neu (CIN) | Carroll | IA | Niagara Central to Arthur N Neu |
| Cairo Regional (CIR) | Cairo | IL | Niagara Central to Cairo Regional |
| Chippewa County International (CIU) | Sault Ste Marie | MI | Niagara Central to Chippewa County International |
| North Central West Virginia (CKB) | Clarksburg | WV | Niagara Central to North Central West Virginia |
| Fletcher Field (CKM) | Clarksdale | MS | Niagara Central to Fletcher Field |
| Crookston Municipal Kirkwood Field (CKN) | Crookston | MN | Niagara Central to Crookston Municipal Kirkwood Field |
| Outlaw Field (CKV) | Clarksville | TN | Niagara Central to Outlaw Field |
| Cleveland/Hopkins International (CLE) | Cleveland | OH | Niagara Central to Cleveland/Hopkins International |
| Clintonville Municipal (CLI) | Clintonville | WI | Niagara Central to Clintonville Municipal |
| Charlotte Douglas International (CLT) | Charlotte | NC | Niagara Central to Charlotte Douglas International |
| Columbus Municipal (CLU) | Columbus | IN | Niagara Central to Columbus Municipal |
| Clearwater Airpark (CLW) | Clearwater | FL | Niagara Central to Clearwater Airpark |
| John Glenn International (CMH) | Columbus | OH | Niagara Central to John Glenn International |
| University of Illinois-Willard (CMI) | Champaign/Urbana | IL | Niagara Central to University of Illinois-Willard |
| Houghton County Memorial (CMX) | Hancock | MI | Niagara Central to Houghton County Memorial |
| Sparta/Fort Mccoy (CMY) | Sparta | WI | Niagara Central to Sparta/Fort Mccoy |
| Claremont Municipal (CNH) | Claremont | NH | Niagara Central to Claremont Municipal |
| Blosser Municipal (CNK) | Concordia | KS | Niagara Central to Blosser Municipal |
| Chanute Martin Johnson (CNU) | Chanute | KS | Niagara Central to Chanute Martin Johnson |
| Merritt Island (COI) | Merritt Island | FL | Niagara Central to Merritt Island |
| Concord Municipal (CON) | Concord | NH | Niagara Central to Concord Municipal |
| Columbia Regional (COU) | Columbia | MO | Niagara Central to Columbia Regional |
| St Louis Downtown (CPS) | Cahokia/St Louis | IL | Niagara Central to St Louis Downtown |
| Debert (CQ3) | Debert | NS | Niagara Central to Debert |
| Florenceville (CR3) | Florenceville | NB | Niagara Central to Florenceville |
| Grand Strand North Myrtle Beach (CRE) | North Myrtle Beach | SC | Niagara Central to Grand Strand North Myrtle Beach |
| Jacksonville Executive at Craig (CRG) | Jacksonville | FL | Niagara Central to Jacksonville Executive at Craig |
| Z M Jack Stell Field (CRT) | Crossett | AR | Niagara Central to Z M Jack Stell Field |
| Yeager (CRW) | Charleston | WV | Niagara Central to Yeager |
| Roscoe Turner (CRX) | Corinth | MS | Niagara Central to Roscoe Turner |
| St Stephen (Giddens Memorial) (CS3) | St Stephen | NB | Niagara Central to St Stephen (Giddens Memorial) |
| Chipman (CS4) | Chipman | NB | Niagara Central to Chipman |
| Columbus Metropolitan (CSG) | Columbus | GA | Niagara Central to Columbus Metropolitan |
| Creston Municipal (CSQ) | Creston | IA | Niagara Central to Creston Municipal |
| Crossville Memorial/Whitson Field (CSV) | Crossville | TN | Niagara Central to Crossville Memorial/Whitson Field |
| Chester County G O Carlson (CTH) | Coatesville | PA | Niagara Central to Chester County G O Carlson |
| Canton Municipal (CTK) | Canton | SD | Niagara Central to Canton Municipal |
| Cortland County-Chase Field (CTX) | Cortland | NY | Niagara Central to Cortland County-Chase Field |
| Cross City (CTY) | Cross City | FL | Niagara Central to Cross City |
| Clinton-Sampson County (CTZ) | Clinton | NC | Niagara Central to Clinton-Sampson County |
| Jim Hamilton L.B. Owens (CUB) | Columbia | SC | Niagara Central to Jim Hamilton L.B. Owens |
| Cushing Municipal (CUH) | Cushing | OK | Niagara Central to Cushing Municipal |
| Cincinnati Northern Kentucky International (CVG) | Cincinnati | OH | Niagara Central to Cincinnati Northern Kentucky International |
| Kings County Municipal (CW3) | Waterville | NS | Niagara Central to Kings County Municipal |
| Central Wisconsin (CWA) | Mosinee | WI | Niagara Central to Central Wisconsin |
| Clinton Municipal (CWI) | Clinton | IA | Niagara Central to Clinton Municipal |
| Daytona Beach International (DAB) | Daytona Beach | FL | Niagara Central to Daytona Beach International |
| Danville Regional (DAN) | Danville | VA | Niagara Central to Danville Regional |
| Dayton International James M Cox (DAY) | Dayton | OH | Niagara Central to Dayton International James M Cox |
| Dublin W H Bud Barron (DBN) | Dublin | GA | Niagara Central to Dublin W H Bud Barron |
| Dubuque Regional (DBQ) | Dubuque | IA | Niagara Central to Dubuque Regional |
| Pryor Field Regional (DCU) | Decatur | AL | Niagara Central to Pryor Field Regional |
| Dodge City Regional (DDC) | Dodge City | KS | Niagara Central to Dodge City Regional |
| Decatur (DEC) | Decatur | IL | Niagara Central to Decatur |
| Decorah Municipal (DEH) | Decorah | IA | Niagara Central to Decorah Municipal |
| Coleman A Young Municipal (DET) | Detroit | MI | Niagara Central to Coleman A Young Municipal |
| Defiance Memorial (DFI) | Defiance | OH | Niagara Central to Defiance Memorial |
| Dothan Regional (DHN) | Dothan | AL | Niagara Central to Dothan Regional |
| Clearwater (DJ4) | Clearwater | NB | Niagara Central to Clearwater |
| Duluth International (DLH) | Duluth | MN | Niagara Central to Duluth International |
| Dillon County Airport (DLL) | Dillon | SD | Niagara Central to Dillon County Airport |
| Sedalia Regional (DMO) | Sedalia | MO | Niagara Central to Sedalia Regional |
| Daniel Field (DNL) | Augusta | GA | Niagara Central to Daniel Field |
| Dalton Municipal (DNN) | Dalton | GA | Niagara Central to Dalton Municipal |
| Denison Municipal (DNS) | Denison | IA | Niagara Central to Denison Municipal |
| Vermilion Regional (DNV) | Danville | IL | Niagara Central to Vermilion Regional |
| Dover AFB (DOV) | Dover | DE | Niagara Central to Dover AFB |
| Dupage (DPA) | Chicago | IL | Niagara Central to Dupage |
| Drummond Island (DRE) | Drummond Island | MI | Niagara Central to Drummond Island |
| Beauregard Regional (DRI) | De Ridder | LA | Niagara Central to Beauregard Regional |
| Destin Executive (DSI) | Destin | FL | Niagara Central to Destin Executive |
| Des Moines International (DSM) | Des Moines | IA | Niagara Central to Des Moines International |
| Detroit Lakes-Wething Field (DTL) | Detroit Lakes | MN | Niagara Central to Detroit Lakes-Wething Field |
| Shreveport Downtown (DTN) | Shreveport | LA | Niagara Central to Shreveport Downtown |
| Detroit Metro Wayne County (DTW) | Detroit | MI | Niagara Central to Detroit Metro Wayne County |
| Durant Regional - Eaker Field (DUA) | Durant | OK | Niagara Central to Durant Regional - Eaker Field |
| Dubois Regional (DUJ) | DuBois | PA | Niagara Central to Dubois Regional |
| Devils Lake Regional (DVL) | Devils Lake | ND | Niagara Central to Devils Lake Regional |
| Davenport Municipal (DVN) | Davenport | IA | Niagara Central to Davenport Municipal |
| Danbury Municipal (DXR) | Danbury | CT | Niagara Central to Danbury Municipal |
| Doylestown (DYL) | Doylestown | PA | Niagara Central to Doylestown |
| Kearney Regional (EAR) | Kearney | NE | Niagara Central to Kearney Regional |
| Chippewa Valley Regional (EAU) | Eau Claire | WI | Niagara Central to Chippewa Valley Regional |
| Webster City Municipal (EBS) | Webster City | IA | Niagara Central to Webster City Municipal |
| Iosco County (ECA) | East Tawas | MI | Niagara Central to Iosco County |
| Elizabeth City Regional & Coast Guard Station (ECG) | Elizabeth City | NC | Niagara Central to Elizabeth City Regional & Coast Guard Station |
| Northwest Florida Beaches International (ECP) | Panama City | FL | Niagara Central to Northwest Florida Beaches International |
| Northeastern Regional (EDE) | Edenton | NC | Niagara Central to Northeastern Regional |
| El Dorado/Captain Jack Thomas Memorial (EDK) | El Dorado | KS | Niagara Central to El Dorado/Captain Jack Thomas Memorial |
| Dilliant-Hopkins (EEN) | Keene | NH | Niagara Central to Dilliant-Hopkins |
| Northeast Kingdom International (EFK) | Newport | VT | Niagara Central to Northeast Kingdom International |
| Jefferson Municipal (EFW) | Jefferson | IA | Niagara Central to Jefferson Municipal |
| Eagle River Union (EGV) | Eagle River | WI | Niagara Central to Eagle River Union |
| Elkhart Municipal (EKI) | Elkhart | IN | Niagara Central to Elkhart Municipal |
| Elkins/Randolph County (EKN) | Elkins | WV | Niagara Central to Elkins/Randolph County |
| Addington Field (EKX) | Elizabethtown | KY | Niagara Central to Addington Field |
| South Arkansas Regional at Goodwin Field (ELD) | El Dorado | AR | Niagara Central to South Arkansas Regional at Goodwin Field |
| Elmira/Corning Regional (ELM) | Elmira | NY | Niagara Central to Elmira/Corning Regional |
| Emporia Municipal (EMP) | Emporia | KS | Niagara Central to Emporia Municipal |
| Centralia Municipal (ENL) | Centralia | IL | Niagara Central to Centralia Municipal |
| Kenosha Regional (ENW) | Kenosha | WI | Niagara Central to Kenosha Regional |
| Keokuk Municipal (EOK) | Keokuk | IA | Niagara Central to Keokuk Municipal |
| Neosho Hugh Robinson (EOS) | Neosho | MO | Niagara Central to Neosho Hugh Robinson |
| Delta County (ESC) | Escanaba | MI | Niagara Central to Delta County |
| Esler Regional (ESF) | Alexandria | LA | Niagara Central to Esler Regional |
| Easton/Newnam Field (ESN) | Easton | MD | Niagara Central to Easton/Newnam Field |
| Stroudsburg-Pocono (ESP) | East Stroudsburg | PA | Niagara Central to Stroudsburg-Pocono |
| Estherville Municipal (EST) | Estherville | IA | Niagara Central to Estherville Municipal |
| West Bend Municipal (ETB) | West Bend | WI | Niagara Central to West Bend Municipal |
| Enterprise Municipal (ETS) | Enterprise | AL | Niagara Central to Enterprise Municipal |
| Weedon Field (EUF) | Eufaula | AL | Niagara Central to Weedon Field |
| Eveleth-Virginia Municipal (EVM) | Eveleth | MN | Niagara Central to Eveleth-Virginia Municipal |
| Evansville Regional (EVV) | Evansville | IN | Niagara Central to Evansville Regional |
| New Bedford Regional (EWB) | New Bedford | MA | Niagara Central to New Bedford Regional |
| Newton City County (EWK) | Newton | KS | Niagara Central to Newton City County |
| Coastal Carolina Regional (EWN) | New Bern | NC | Niagara Central to Coastal Carolina Regional |
| Newark Liberty International (EWR) | Newark | NJ | Niagara Central to Newark Liberty International |
| Farmington Regional (FAM) | Farmington | MO | Niagara Central to Farmington Regional |
| Hector International Fargo (FAR) | Fargo | ND | Niagara Central to Hector International Fargo |
| Fayetteville Regional/Grannis Field (FAY) | Fayetteville | NC | Niagara Central to Fayetteville Regional/Grannis Field |
| Faribault Municipal (FBL) | Faribault | MN | Niagara Central to Faribault Municipal |
| Fairbury Municipal (FBY) | Fairbury | NE | Niagara Central to Fairbury Municipal |
| Flying Cloud (FCM) | Minneapolis | MN | Niagara Central to Flying Cloud |
| Forrest City Municipal (FCY) | Forrest City | AR | Niagara Central to Forrest City Municipal |
| Frederick Municipal (FDK) | Frederick | MD | Niagara Central to Frederick Municipal |
| Findlay (FDY) | Findlay | OH | Niagara Central to Findlay |
| Albertus (FEP) | Freeport | IL | Niagara Central to Albertus |
| Fremont Municipal (FET) | Fremont | NE | Niagara Central to Fremont Municipal |
| First Flight (FFA) | Kill Devil Hills | NC | Niagara Central to First Flight |
| Fairfield Municipal (FFL) | Fairfield | IA | Niagara Central to Fairfield Municipal |
| Fergus Falls Municipal-Einar Mickelson Field (FFM) | Fergus Falls | MN | Niagara Central to Fergus Falls Municipal-Einar Mickelson Field |
| Capital City (FFT) | Frankfort | KY | Niagara Central to Capital City |
| Fox Harbour (FH4) | Fox Harbour | NS | Niagara Central to Fox Harbour |
| Venango Regional (FKL) | Franklin | PA | Niagara Central to Venango Regional |
| Franklin Municipal-John Beverly Rose (FKN) | Franklin | VA | Niagara Central to Franklin Municipal-John Beverly Rose |
| Fond Du Lac County (FLD) | Fond Du Lac | WI | Niagara Central to Fond Du Lac County |
| Florence Regional (FLO) | Florence | SC | Niagara Central to Florence Regional |
| Marion County Regional (FLP) | Flippin | AR | Niagara Central to Marion County Regional |
| Sherman Army Airfield (FLV) | Fort Leavenworth | KS | Niagara Central to Sherman Army Airfield |
| Fort Meade (Odenton) Tipton (FME) | Fort Meade Odenton | MD | Niagara Central to Fort Meade (Odenton) Tipton |
| Fort Madison Municipal (FMS) | Fort Madison | IA | Niagara Central to Fort Madison Municipal |
| Page Field (FMY) | Fort Myers | FL | Niagara Central to Page Field |
| Bishop International (FNT) | Flint | MI | Niagara Central to Bishop International |
| Fort Dodge Regional (FOD) | Fort Dodge | IA | Niagara Central to Fort Dodge Regional |
| Topeka Regional (FOE) | Topeka | KS | Niagara Central to Topeka Regional |
| Francis S Gabreski (FOK) | Westhampton Beach | NY | Niagara Central to Francis S Gabreski |
| Grand Bahama International (FPO) | Freeport | | Niagara Central to Grand Bahama International |
| Treasure Coast International (FPR) | Fort Pierce | FL | Niagara Central to Treasure Coast International |
| Perry-Foley (FPY) | Perry | FL | Niagara Central to Perry-Foley |
| Republic Long Island (FRG) | Farmingdale | NY | Niagara Central to Republic Long Island |
| French Lick Municipal (FRH) | French Lick | IN | Niagara Central to French Lick Municipal |
| Fairmont Municipal (FRM) | Fairmont | MN | Niagara Central to Fairmont Municipal |
| Front Royal-Warren County (FRR) | Front Royal | VA | Niagara Central to Front Royal-Warren County |
| Eastern Slopes Regional (FRY) | Fryeburg | ME | Niagara Central to Eastern Slopes Regional |
| Sioux Falls Regional, Joe Foss Field (FSD) | Sioux Falls | SD | Niagara Central to Sioux Falls Regional, Joe Foss Field |
| Fort Scott Municipal (FSK) | Fort Scott | KS | Niagara Central to Fort Scott Municipal |
| Fort Smith Regional (FSM) | Fort Smith | AR | Niagara Central to Fort Smith Regional |
| Fulton County/Brown Field (FTY) | Atlanta | GA | Niagara Central to Fulton County/Brown Field |
| Fort Wayne International (FWA) | Fort Wayne | IN | Niagara Central to Fort Wayne International |
| Branson West Municipal - Emerson Field (FWB) | Branson West | MO | Niagara Central to Branson West Municipal - Emerson Field |
| Forest City Municipal (FXY) | Forest City | IA | Niagara Central to Forest City Municipal |
| Fayetteville Municipal (FYM) | Fayetteville | TN | Niagara Central to Fayetteville Municipal |
| Drake Field (FYV) | Fayetteville | AR | Niagara Central to Drake Field |
| Northeast Alabama Regional (GAD) | Gadsden | AL | Niagara Central to Northeast Alabama Regional |
| Montgomery County Airpark (GAI) | Gaithersburg | MD | Niagara Central to Montgomery County Airpark |
| Great Bend Municipal (GBD) | Great Bend | KS | Niagara Central to Great Bend Municipal |
| Galesburg Municipal (GBG) | Galesburg | IL | Niagara Central to Galesburg Municipal |
| Greeneville-Greene County Municipal (GCY) | Greeneville | TN | Niagara Central to Greeneville-Greene County Municipal |
| Donaldson Field (GDC) | Greenville | SC | Niagara Central to Donaldson Field |
| Gardner Municipal (GDM) | Gardner | MA | Niagara Central to Gardner Municipal |
| Gladwin Zettel Memorial (GDW) | Gladwin | MI | Niagara Central to Gladwin Zettel Memorial |
| Delaware Coastal (GED) | Georgetown | DE | Niagara Central to Delaware Coastal |
| Grand Forks International (GFK) | Grand Forks | ND | Niagara Central to Grand Forks International |
| Floyd Bennett Memorial (GFL) | Glens Falls | NY | Niagara Central to Floyd Bennett Memorial |
| Georgetown County (GGE) | Georgetown | SC | Niagara Central to Georgetown County |
| East Texas Regional (GGG) | Longview | TX | Niagara Central to East Texas Regional |
| Centerville Municipal (GHM) | Centerville | TN | Niagara Central to Centerville Municipal |
| Winter Haven Regional (GIF) | Winter Haven | FL | Niagara Central to Winter Haven Regional |
| Gatlinburg-Pigeon Forge (GKT) | Sevierville | TN | Niagara Central to Gatlinburg-Pigeon Forge |
| Greenville Mid-Delta (GLH) | Greenville | MS | Niagara Central to Greenville Mid-Delta |
| Gaylord Regional (GLR) | Gaylord | MI | Niagara Central to Gaylord Regional |
| Glasgow Municipal (GLW) | Glasgow | KY | Niagara Central to Glasgow Municipal |
| Greenville Downtown (GMU) | Greenville | SC | Niagara Central to Greenville Downtown |
| Gainesville Regional (GNV) | Gainesville | FL | Niagara Central to Gainesville Regional |
| Guthrie-Edmond Regional (GOK) | Guthrie | OK | Niagara Central to Guthrie-Edmond Regional |
| Groton New London (GON) | Groton New London | CT | Niagara Central to Groton New London |
| Gulfport-Biloxi International (GPT) | Gulfport | MS | Niagara Central to Gulfport-Biloxi International |
| Grand Rapids/Itasca County-Gordon Newstrom Field (GPZ) | Grand Rapids | MN | Niagara Central to Grand Rapids/Itasca County-Gordon Newstrom Field |
| Galion Municipal (GQQ) | Galion | OH | Niagara Central to Galion Municipal |
| Austin Straubel International (GRB) | Green Bay | WI | Niagara Central to Austin Straubel International |
| Greenwood County (GRD) | Greenwood | SC | Niagara Central to Greenwood County |
| Greenville (GRE) | Greenville | IL | Niagara Central to Greenville |
| Central Nebraska Regional (GRI) | Grand Island | NE | Niagara Central to Central Nebraska Regional |
| Grand Marais/Cook County (GRM) | Grand Marais | MN | Niagara Central to Grand Marais/Cook County |
| Gerald R Ford International (GRR) | Grand Rapids | MI | Niagara Central to Gerald R Ford International |
| Goshen Municipal (GSH) | Goshen | IN | Niagara Central to Goshen Municipal |
| Piedmont Triad International (GSO) | Greensboro | NC | Niagara Central to Piedmont Triad International |
| Greenville Spartanburg International (GSP) | Greer | SC | Niagara Central to Greenville Spartanburg International |
| Golden Triangle Regional (GTR) | Columbus | MS | Niagara Central to Golden Triangle Regional |
| Gettysburg Regional (GTY) | Gettysburg | PA | Niagara Central to Gettysburg Regional |
| Jack Edwards National (GUF) | Gulf Shores | AL | Niagara Central to Jack Edwards National |
| Grissom Aeroplex/Arb (GUS) | Peru | IN | Niagara Central to Grissom Aeroplex/Arb |
| Lee Gilmer Memorial (GVL) | Gainesville | GA | Niagara Central to Lee Gilmer Memorial |
| Majors (GVT) | Greenville | TX | Niagara Central to Majors |
| Greenwood Leflore (GWO) | Greenwood | MS | Niagara Central to Greenwood Leflore |
| Gary/Chicago International (GYY) | GARY | IN | Niagara Central to Gary/Chicago International |
| Marion County-Rankin Fite (HAB) | Hamilton | AL | Niagara Central to Marion County-Rankin Fite |
| Three Rivers Municipal Dr Haines (HAI) | Three Rivers | MI | Niagara Central to Three Rivers Municipal Dr Haines |
| Butler County Regional-Hogan Field (HAO) | Hamilton | OH | Niagara Central to Butler County Regional-Hogan Field |
| Capital City Harrisburg (HAR) | Harrisburg | PA | Niagara Central to Capital City Harrisburg |
| Hattiesburg Bobby L Chain Municipal (HBG) | Hattiesburg | MS | Niagara Central to Hattiesburg Bobby L Chain Municipal |
| Columbia County (HCC) | Hudson | NY | Niagara Central to Columbia County |
| Cheraw Municipal/Lynch Bellinger Field (HCW) | Cheraw | SC | Niagara Central to Cheraw Municipal/Lynch Bellinger Field |
| Brewster Field (HDE) | Holdrege | NE | Niagara Central to Brewster Field |
| Thompson-Robbins (HEE) | Helena/West Helena | AR | Niagara Central to Thompson-Robbins |
| Manassas Regional/Harry P Davis Field (HEF) | Manassas | VA | Niagara Central to Manassas Regional/Harry P Davis Field |
| Natchez-Adams County (Hardy-Anders Field) (HEZ) | Natchez | MS | Niagara Central to Natchez-Adams County (Hardy-Anders Field) |
| Hartford/Brainard (HFD) | Hartford | CT | Niagara Central to Hartford/Brainard |
| Richard A Henson Field/Hagerstown Regional (HGR) | Hagerstown | MD | Niagara Central to Richard A Henson Field/Hagerstown Regional |
| Hilton Head (HHH) | Hilton Head Island | SC | Niagara Central to Hilton Head |
| Range Regional (HIB) | Hibbing | MN | Niagara Central to Range Regional |
| Mount Washington Regional (HIE) | Whitefield | NH | Niagara Central to Mount Washington Regional |
| Blytheville Municipal (HKA) | Blytheville | AR | Niagara Central to Blytheville Municipal |
| Hawkins Field (HKS) | Jackson | MS | Niagara Central to Hawkins Field |
| Hickory Regional (HKY) | Hickory | NC | Niagara Central to Hickory Regional |
| Hill City Municipal (HLC) | Hill City | KS | Niagara Central to Hill City Municipal |
| Wheeling Ohio County (HLG) | Wheeling | WV | Niagara Central to Wheeling Ohio County |
| Huntingburg (HNB) | Huntingburg | IN | Niagara Central to Huntingburg |
| Billy Mitchell (HNC) | Hatteras | NC | Niagara Central to Billy Mitchell |
| Huron Regional (HON) | Huron | SD | Niagara Central to Huron Regional |
| Memorial Field (HOT) | Hot Springs | AR | Niagara Central to Memorial Field |
| Westchester County (HPN) | White Plains | NY | Niagara Central to Westchester County |
| Hampton Municipal (HPT) | Hampton | IA | Niagara Central to Hampton Municipal |
| Boone County Regional (HRO) | Harrison | AR | Niagara Central to Boone County Regional |
| Harrisburg-Raleigh (HSB) | Harrisburg | IL | Niagara Central to Harrisburg-Raleigh |
| Hastings Municipal (HSI) | Hastings | NE | Niagara Central to Hastings Municipal |
| Ingalls Field (HSP) | Hot Springs | VA | Niagara Central to Ingalls Field |
| Huntsville International/Carl T Jones Field (HSV) | Huntsville | AL | Niagara Central to Huntsville International/Carl T Jones Field |
| Roscommon County - Blodgett Memorial (HTL) | Houghton Lake | MI | Niagara Central to Roscommon County - Blodgett Memorial |
| East Hampton (JPX) | East Hampton | NY | Niagara Central to East Hampton |
| Tri-State Milton J Ferguson Field (HTS) | Huntington | WV | Niagara Central to Tri-State Milton J Ferguson Field |
| Humboldt Municipal (HUD) | Humboldt | IA | Niagara Central to Humboldt Municipal |
| Terre Haute Regional (HUF) | Terre Haute | IN | Niagara Central to Terre Haute Regional |
| Stan Stamper Municipal (HUJ) | Hugo | OK | Niagara Central to Stan Stamper Municipal |
| Houlton International (HUL) | Houlton | ME | Niagara Central to Houlton International |
| Houma-Terrebonne (HUM) | Houma | LA | Niagara Central to Houma-Terrebonne |
| Hutchinson Regional (HUT) | Hutchinson | KS | Niagara Central to Hutchinson Regional |
| Tweed/New Haven (HVN) | New Haven | CT | Niagara Central to Tweed/New Haven |
| Hartsville Regional (HVS) | Hartsville | SC | Niagara Central to Hartsville Regional |
| Barnstable Municipal/Boardman-Polando Field (HYA) | Hyannis | MA | Niagara Central to Barnstable Municipal/Boardman-Polando Field |
| Sawyer County (HYR) | Hayward | WI | Niagara Central to Sawyer County |
| Hays Regional (HYS) | Hays | KS | Niagara Central to Hays Regional |
| Hazleton Regional (HZL) | Hazleton | PA | Niagara Central to Hazleton Regional |
| Washington Dulles International (IAD) | Washington | VA | Niagara Central to Washington Dulles International |
| Schenck Field (ICL) | Clarinda | IA | Niagara Central to Schenck Field |
| Wichita Eisenhower National (ICT) | Wichita | KS | Niagara Central to Wichita Eisenhower National |
| Ida Grove Municipal (IDG) | Ida Grove | IA | Niagara Central to Ida Grove Municipal |
| Indiana County/Jimmy Stewart Field (IDI) | Indiana | PA | Niagara Central to Indiana County/Jimmy Stewart Field |
| Independence Municipal (IDP) | Independence | KS | Niagara Central to Independence Municipal |
| Iowa Falls Municipal (IFA) | Iowa Falls | IA | Niagara Central to Iowa Falls Municipal |
| Jacksonville Municipal (IJX) | Jacksonville | IL | Niagara Central to Jacksonville Municipal |
| Wilkes County (IKB) | N Wilkesboro | NC | Niagara Central to Wilkes County |
| Greater Kankakee (IKK) | Kankakee | IL | Niagara Central to Greater Kankakee |
| Wilmington/New Castle (ILG) | Wilmington | DE | Niagara Central to Wilmington/New Castle |
| Willmar Municipal/John L Rice Field (ILL) | Willmar | MN | Niagara Central to Willmar Municipal/John L Rice Field |
| Wilmington International (ILM) | Wilmington | NC | Niagara Central to Wilmington International |
| Wilmington Airpark (ILN) | Wilmington | OH | Niagara Central to Wilmington Airpark |
| Immokalee Regional (IMM) | Immokalee | FL | Niagara Central to Immokalee Regional |
| Ford (IMT) | Iron Mountain | MI | Niagara Central to Ford |
| Indianapolis International (IND) | Indianapolis | IN | Niagara Central to Indianapolis International |
| Falls Intl-Einarson Field (INL) | International Falls | MN | Niagara Central to Falls Intl-Einarson Field |
| Smith Reynolds (INT) | Winston-Salem | NC | Niagara Central to Smith Reynolds |
| Iowa City Municipal (IOW) | Iowa City | IA | Niagara Central to Iowa City Municipal |
| Williamsport Regional (IPT) | Williamsport | PA | Niagara Central to Williamsport Regional |
| Kirksville Regional (IRK) | Kirksville | MO | Niagara Central to Kirksville Regional |
| Kirsch Municipal (IRS) | Sturgis | MI | Niagara Central to Kirsch Municipal |
| Kissimmee Gateway (ISM) | Orlando | FL | Niagara Central to Kissimmee Gateway |
| Kinston Regional Jetport Stallings Field (ISO) | Kinston | NC | Niagara Central to Kinston Regional Jetport Stallings Field |
| Long Island Macarthur (ISP) | Islip | NY | Niagara Central to Long Island Macarthur |
| Schoolcraft County (ISQ) | Manistique | MI | Niagara Central to Schoolcraft County |
| Wiscasset (ISS) | Wiscasset | ME | Niagara Central to Wiscasset |
| Alexander Field South Wood County (ISW) | Wisconsin Rapids | WI | Niagara Central to Alexander Field South Wood County |
| Ithaca Tompkins Regional (ITH) | Ithaca | NY | Niagara Central to Ithaca Tompkins Regional |
| Gogebic-Iron County (IWD) | Ironwood | MI | Niagara Central to Gogebic-Iron County |
| Morden (JA3) | Morden | MB | Niagara Central to Morden |
| Jackson/Evers International (JAN) | Jackson | MS | Niagara Central to Jackson/Evers International |
| Jacksonville International (JAX) | Jacksonville | FL | Niagara Central to Jacksonville International |
| Steinbach (JB3) | Steinbach | MB | Niagara Central to Steinbach |
| Jonesboro Municipal (JBR) | Jonesboro | AR | Niagara Central to Jonesboro Municipal |
| New Century Aircenter (JCI) | Olathe | KS | Niagara Central to New Century Aircenter |
| Jefferson City Memorial (JEF) | Jefferson City | MO | Niagara Central to Jefferson City Memorial |
| New York/John F Kennedy International (JFK) | New York | NY | Niagara Central to New York/John F Kennedy International |
| Northeast Ohio Regional (JFN) | Ashtabula | OH | Niagara Central to Northeast Ohio Regional |
| Deloraine (JJ4) | Deloraine | MB | Niagara Central to Deloraine |
| Altona Municipal (JL6) | Altona | MB | Niagara Central to Altona Municipal |
| Joplin Regional (JLN) | Joplin | MO | Niagara Central to Joplin Regional |
| Jamestown Regional (JMS) | Jamestown | ND | Niagara Central to Jamestown Regional |
| John Murtha Johnstown/Cambria County (JST) | Johnstown | PA | Niagara Central to John Murtha Johnstown/Cambria County |
| Neepawa (JV5) | Neepawa | MB | Niagara Central to Neepawa |
| Central Jersey Regional (JVI) | Manville | NJ | Niagara Central to Central Jersey Regional |
| Souther Wisconsin Regional (JVL) | Janesville | WI | Niagara Central to Souther Wisconsin Regional |
| Jackson County/Reynolds Field (JXN) | Jackson | MI | Niagara Central to Jackson County/Reynolds Field |
| Williams County (K0G6) | Bryan | OH | Niagara Central to Williams County |
| Finger Lakes Regional (K0G7) | Seneca Falls | NY | Niagara Central to Finger Lakes Regional |
| Camden County (K19N) | Berlin | NJ | Niagara Central to Camden County |
| Mansfield Municipal (K1B9) | Mansfield | MA | Niagara Central to Mansfield Municipal |
| Wood County Regional (K1G0) | Bowling Green | OH | Niagara Central to Wood County Regional |
| Kent State University (K1G3) | Kent | OH | Niagara Central to Kent State University |
| Medina Municipal (K1G5) | Medina | OH | Niagara Central to Medina Municipal |
| Creve Coeur (K1H0) | St Louis | MO | Niagara Central to Creve Coeur |
| Effingham County Memorial (K1H2) | Effingham | IL | Niagara Central to Effingham County Memorial |
| Kingston-Ulster (K20N) | Kingston | NY | Niagara Central to Kingston-Ulster |
| Shelby County (K2H0) | Shelbyville | IL | Niagara Central to Shelby County |
| Maryland (K2W5) | Indian Head | MD | Niagara Central to Maryland |
| Eagles Nest (K31E) | West Creek | NJ | Niagara Central to Eagles Nest |
| Delaware Airpark (K33N) | Dover/Cheswold | DE | Niagara Central to Delaware Airpark |
| Lake In The Hills (K3CK) | Chicago | IL | Niagara Central to Lake In The Hills |
| Greene County Regional (K3J7) | Greensboro | GA | Niagara Central to Greene County Regional |
| Mount Hawley Auxiliary (K3MY) | Peoria | IL | Niagara Central to Mount Hawley Auxiliary |
| Old Bridge (K3N6) | Old Bridge | NJ | Niagara Central to Old Bridge |
| Scottsboro Municipal-Word Field (K4A6) | Scottsboro | AL | Niagara Central to Scottsboro Municipal-Word Field |
| Ticonderoga Municipal (K4B6) | Ticonderoga | NY | Niagara Central to Ticonderoga Municipal |
| Youngstown Elser Metro (K4G4) | Youngstown | OH | Niagara Central to Youngstown Elser Metro |
| Saratoga County (K5B2) | Saratoga Springs | NY | Niagara Central to Saratoga County |
| Odell Williamson Municipal (K60J) | Ocean Isle Beach | NC | Niagara Central to Odell Williamson Municipal |
| Skaneateles (K6B9) | Skaneateles | NY | Niagara Central to Skaneateles |
| Northampton (K7B2) | Northampton | MA | Niagara Central to Northampton |
| Skylark Airpark (K7B6) | Warehouse Point | CT | Niagara Central to Skylark Airpark |
| Bearce (K7M3) | Mount Ida | AR | Niagara Central to Bearce |
| Ferguson Airport (K82J) | Pensacola | FL | Niagara Central to Ferguson Airport |
| Paul C. Miller-Sparta (K8D4) | Sparta | MI | Niagara Central to Paul C. Miller-Sparta |
| Wichita Col James Jabara (KAAO) | Wichita | KS | Niagara Central to Wichita Col James Jabara |
| Anoka County-Blaine (Janes Field) (KANE) | Minneapolis | MN | Niagara Central to Anoka County-Blaine (Janes Field) |
| Slidell (KASD) | Slidell | LA | Niagara Central to Slidell |
| Biddeford Municipal (KB19) | Biddeford | ME | Niagara Central to Biddeford Municipal |
| Huron County Memorial (KBAX) | Bad Axe | MI | Niagara Central to Huron County Memorial |
| Brooksville-Tampa Bay Regional (KBKV) | Brooksville | FL | Niagara Central to Brooksville-Tampa Bay Regional |
| Belfast Municipal (KBST) | Belfast | ME | Niagara Central to Belfast Municipal |
| Burlington Municipal (KBUU) | Burlington | WI | Niagara Central to Burlington Municipal |
| Burlington-Alamance Regional (KBUY) | Burlington | NC | Niagara Central to Burlington-Alamance Regional |
| Newnan Coweta County (KCCO) | Atlanta | GA | Niagara Central to Newnan Coweta County |
| Cambridge Municipal (KCDI) | Cambridge | OH | Niagara Central to Cambridge Municipal |
| Crystal River (KCGC) | Crystal River | FL | Niagara Central to Crystal River |
| Pennridge (KCKZ) | Perkasie | PA | Niagara Central to Pennridge |
| Cherokee County Regional (KCNI) | Canton | GA | Niagara Central to Cherokee County Regional |
| Chesapeake Regional (KCPK) | Norfolk | VA | Niagara Central to Chesapeake Regional |
| Chatham Municipal (KCQX) | Chatham | MA | Niagara Central to Chatham Municipal |
| West Georgia Regional - O V Gray Field (KCTJ) | Carrollton | GA | Niagara Central to West Georgia Regional - O V Gray Field |
| Charlevoix Municipal (KCVX) | Charlevoix | MI | Niagara Central to Charlevoix Municipal |
| Manitowish Waters (KD25) | Manitowish Waters | WI | Niagara Central to Manitowish Waters |
| Skyhaven (KDAW) | Rochester | NH | Niagara Central to Skyhaven |
| Chester Catawba Regional (KDCM) | Chester | SC | Niagara Central to Chester Catawba Regional |
| Bennington/William H. Morse State (KDDH) | Bennington | VT | Niagara Central to Bennington/William H. Morse State |
| Knoxville Downtown Island (KDKX) | Knoxville | TN | Niagara Central to Knoxville Downtown Island |
| Carroll County Regional/Jack B Poage Field (KDMW) | Westminster | MD | Niagara Central to Carroll County Regional/Jack B Poage Field |
| Kenansville/Duplin County (KDPL) | Kenansville | NC | Niagara Central to Kenansville/Duplin County |
| Toledo Suburban (KDUH) | Lambertville | MI | Niagara Central to Toledo Suburban |
| Mitchell Field Bessemer (KEKY) | Bessemer | AL | Niagara Central to Mitchell Field Bessemer |
| Davidson County (KEXX) | Lexington | NC | Niagara Central to Davidson County |
| Eagle Creek Airpark (KEYE) | Indianapolis | IN | Niagara Central to Eagle Creek Airpark |
| Kewanee Municipal (KEZI) | Kewanee | IL | Niagara Central to Kewanee Municipal |
| North Palm Beach County General Aviation (KF45) | West Palm Beach | FL | Niagara Central to North Palm Beach County General Aviation |
| Atlanta Regional/Falcon Field (KFFC) | Atlanta | GA | Niagara Central to Atlanta Regional/Falcon Field |
| Fernandina Beach Municipal (KFHB) | Fernandina Beach | FL | Niagara Central to Fernandina Beach Municipal |
| Hammond Northshore Regional (KHDC) | Hammond | LA | Niagara Central to Hammond Northshore Regional |
| Ortner (KI64) | Wakeman | OH | Niagara Central to Ortner |
| Breckinridge County (KI93) | Hardinsburg | KY | Niagara Central to Breckinridge County |
| Canandaigua (KIUA) | Canandaigua | NY | Niagara Central to Canandaigua |
| Wabash Municipal (KIWH) | Wabash | IN | Niagara Central to Wabash Municipal |
| Williamsburg-Jamestown (KJGG) | Williamsburg | VA | Niagara Central to Williamsburg-Jamestown |
| John C Tune (KJWN) | Nashville | TN | Niagara Central to John C Tune |
| Leesburg Executive (KJYO) | Leesburg | VA | Niagara Central to Leesburg Executive |
| Charleston Executive (KJZI) | Charleston | SC | Niagara Central to Charleston Executive |
| Gene Snyder (KK62) | Falmouth | KY | Niagara Central to Gene Snyder |
| Kentland Municipal (KKT) | Kentland | IN | Niagara Central to Kentland Municipal |
| Mt Pleasant Regional-Faison Field (KLRO) | Mount Pleasant | SC | Niagara Central to Mt Pleasant Regional-Faison Field |
| South Haven Area Regional (KLWA) | South Haven | MI | Niagara Central to South Haven Area Regional |
| Lee's Summit Municipal (KLXT) | Lee's Summit | MO | Niagara Central to Lee's Summit Municipal |
| General Dewitt Spain (KM01) | Memphis | TN | Niagara Central to General Dewitt Spain |
| Harbor Springs (KMGN) | Harbor Springs | MI | Niagara Central to Harbor Springs |
| Metter Municipal (KMHP) | Metter | GA | Niagara Central to Metter Municipal |
| Mountain Empire (KMKJ) | Marion-Wythevil | VA | Niagara Central to Mountain Empire |
| Indianapolis Regional (KMQJ) | Indianapolis | IN | Niagara Central to Indianapolis Regional |
| Michael J. Smith Field (KMRH) | Beaufort | NC | Niagara Central to Michael J. Smith Field |
| Bradford County (KN27) | Towanda | PA | Niagara Central to Bradford County |
| Stormville (KN69) | Stormville | NY | Niagara Central to Stormville |
| Joseph Y Resnick (KN89) | Ellenville | NY | Niagara Central to Joseph Y Resnick |
| Kennett Memorial (KNT) | Kennett | MO | Niagara Central to Kennett Memorial |
| Hanover County Municipal (KOFP) | Richmond | VA | Niagara Central to Hanover County Municipal |
| Currituck County Regional (KONX) | Currituck | NC | Niagara Central to Currituck County Regional |
| Detroit Grosse Ile Municipal (KONZ) | Detroit Grosse Ile | MI | Niagara Central to Detroit Grosse Ile Municipal |
| Brandywine (KOQN) | West Chester | PA | Niagara Central to Brandywine |
| Orr Regional (KORB) | Orr | MN | Niagara Central to Orr Regional |
| Price County (KPBH) | Phillips | WI | Niagara Central to Price County |
| Pike County-Hatcher Field (KPBX) | Pikeville | KY | Niagara Central to Pike County-Hatcher Field |
| Penn Yan (KPEO) | Penn Yan | NY | Niagara Central to Penn Yan |
| Platteville Municipal (KPVB) | Platteville | WI | Niagara Central to Platteville Municipal |
| Erickson Municipal (KQ6) | Erickson | MB | Niagara Central to Erickson Municipal |
| Stafford Regional (KRMN) | Stafford | VA | Niagara Central to Stafford Regional |
| Cobb County International-McCollum Field (KRYY) | Atlanta | GA | Niagara Central to Cobb County International-McCollum Field |
| Saline County Regional (KSUZ) | Benton | AR | Niagara Central to Saline County Regional |
| Mason Jewett Field (KTEW) | Mason | MI | Niagara Central to Mason Jewett Field |
| Centerville Municipal (KTVK) | Centerville | IA | Niagara Central to Centerville Municipal |
| Indianapolis Executive (KTYQ) | Indianapolis | IN | Niagara Central to Indianapolis Executive |
| Indianapolis Metropolitan (KUMP) | Indianapolis | IN | Niagara Central to Indianapolis Metropolitan |
| Bentonville Municipal/Louise M Thaden Field (KVBT) | Bentonville | AR | Niagara Central to Bentonville Municipal/Louise M Thaden Field |
| Tampa Executive (KVDF) | Tampa | FL | Niagara Central to Tampa Executive |
| Hamilton Municipal (KVGC) | Hamilton | NY | Niagara Central to Hamilton Municipal |
| Oakland/Troy (KVLL) | Troy | MI | Niagara Central to Oakland/Troy |
| Washington Executive/Hyde Field (KW32) | Clinton | MD | Niagara Central to Washington Executive/Hyde Field |
| Allentown Queen City Municipal (KXLL) | Allentown | PA | Niagara Central to Allentown Queen City Municipal |
| Purdue University (LAF) | Lafayette | IN | Niagara Central to Purdue University |
| Lakeland Linder International (LAL) | Lakeland | FL | Niagara Central to Lakeland Linder International |
| Capital Region International (LAN) | Lansing | MI | Niagara Central to Capital Region International |
| Arnold Palmer Regional (LBE) | Latrobe | PA | Niagara Central to Arnold Palmer Regional |
| North Platte Regional/Lee Bird Field (LBF) | North Platte | NE | Niagara Central to North Platte Regional/Lee Bird Field |
| Lumberton Regional (LBT) | Lumberton | NC | Niagara Central to Lumberton Regional |
| Laconia Municipal (LCI) | Laconia | NH | Niagara Central to Laconia Municipal |
| Rickenbacker International (LCK) | Columbus | OH | Niagara Central to Rickenbacker International |
| Linden (LDJ) | Linden | NJ | Niagara Central to Linden |
| Mason County (LDM) | Ludington | MI | Niagara Central to Mason County |
| Lebanon Municipal (LEB) | Lebanon | NH | Niagara Central to Lebanon Municipal |
| Leesburg International (LEE) | Leesburg | FL | Niagara Central to Leesburg International |
| Lemmon Municipal (LEM) | Lemmon | SD | Niagara Central to Lemmon Municipal |
| Auburn/Lewiston Municipal (LEW) | Auburn/Lewiston | ME | Niagara Central to Auburn/Lewiston Municipal |
| Blue Grass (LEX) | Lexington | KY | Niagara Central to Blue Grass |
| Triangle North Executive (LFN) | Louisburg | NC | Niagara Central to Triangle North Executive |
| Lafayette Regional (LFT) | Lafayette | LA | Niagara Central to Lafayette Regional |
| La Guardia (LGA) | New York | NY | Niagara Central to La Guardia |
| Lagrange-Callaway (LGC) | Lagrange | GA | Niagara Central to Lagrange-Callaway |
| William T. Piper Memorial (LHV) | Lock Haven | PA | Niagara Central to William T. Piper Memorial |
| Bill & Hillary Clinton National/Adams Field (LIT) | Little Rock | AR | Niagara Central to Bill & Hillary Clinton National/Adams Field |
| Midcoast Regional at Wright Army (LIY) | Hinesville | GA | Niagara Central to Midcoast Regional at Wright Army |
| Lake Placid (LKP) | Lake Placid | NY | Niagara Central to Lake Placid |
| Caledonia County (LLX) | Lyndonville | VT | Niagara Central to Caledonia County |
| South Jersey Regional (LLY) | Mount Holly | NJ | Niagara Central to South Jersey Regional |
| Leamington (LM2) | Leamington | ON | Niagara Central to Leamington |
| Louisville Winston County (LMS) | Louisville | MS | Niagara Central to Louisville Winston County |
| Palm Beach County Park (LNA) | West Palm Beach | FL | Niagara Central to Palm Beach County Park |
| Lincoln Municipal (LNK) | Lincoln | NE | Niagara Central to Lincoln Municipal |
| Willoughby Lost Nation Municipal (LNN) | Willoughby | OH | Niagara Central to Willoughby Lost Nation Municipal |
| Lonesome Pine (LNP) | Wise | VA | Niagara Central to Lonesome Pine |
| Tri-County Regional (LNR) | Lone Rock | WI | Niagara Central to Tri-County Regional |
| Lancaster (LNS) | Lancaster | PA | Niagara Central to Lancaster |
| Lewis University Chicago Romeoville (LOT) | Chicago/Romeoville | IL | Niagara Central to Lewis University Chicago Romeoville |
| Bowman Field (LOU) | Louisville | KY | Niagara Central to Bowman Field |
| Louisa County/Freeman Field (LOW) | Louisa | VA | Niagara Central to Louisa County/Freeman Field |
| London Corbin Magee Field (LOZ) | London | KY | Niagara Central to London Corbin Magee Field |
| La Porte Municipal (LPO) | La Porte | IN | Niagara Central to La Porte Municipal |
| Pickens County (LQK) | Pickens | SC | Niagara Central to Pickens County |
| Le Mars Municipal (LRJ) | Le Mars | IA | Niagara Central to Le Mars Municipal |
| La Crosse Regional (LSE) | La Crosse | WI | Niagara Central to La Crosse Regional |
| St. Mary's County Regional (LTW) | Leonardtown | MD | Niagara Central to St. Mary's County Regional |
| Cincinnati Municipal Lunken (LUK) | Cincinnati | OH | Niagara Central to Cincinnati Municipal Lunken |
| Hesler-Noble Field (LUL) | Laurel | MS | Niagara Central to Hesler-Noble Field |
| Lawrenceville/Brunswick Municipal (LVL) | Lawrenceville | VA | Niagara Central to Lawrenceville/Brunswick Municipal |
| Greenbrier Valley (LWB) | Lewisburg | WV | Niagara Central to Greenbrier Valley |
| Lawrence Municipal (LWC) | Lawrence | KS | Niagara Central to Lawrence Municipal |
| Lawrence Municipal (LWM) | Lawrence | MA | Niagara Central to Lawrence Municipal |
| Lawrenceville-Vincennes International (LWV) | Lawrenceville | IL | Niagara Central to Lawrenceville-Vincennes International |
| Jim Kelly Field (LXN) | Lexington | NE | Niagara Central to Jim Kelly Field |
| Lynchburg Regional/Preston Glenn Field (LYH) | Lynchburg | VA | Niagara Central to Lynchburg Regional/Preston Glenn Field |
| Lyons-Rice County Muni (LYO) | Lyons | KS | Niagara Central to Lyons-Rice County Muni |
| Ely Municipal (LYU) | Ely | MN | Niagara Central to Ely Municipal |
| Quentin Aanenson Field (LYV) | Luverne | MN | Niagara Central to Quentin Aanenson Field |
| Briscoe Field/Gwinnett County (LZU) | Lawrenceville | GA | Niagara Central to Briscoe Field/Gwinnett County |
| Macon Downtown (MAC) | Macon | GA | Niagara Central to Macon Downtown |
| Malden Regional (MAW) | Malden | MO | Niagara Central to Malden Regional |
| Mobridge Municipal (MBG) | Mobridge | SD | Niagara Central to Mobridge Municipal |
| Manistee County-Blacker (MBL) | Manistee | MI | Niagara Central to Manistee County-Blacker |
| Mbs International (MBS) | Saginaw | MI | Niagara Central to Mbs International |
| Omar N Bradley (MBY) | Moberly | MO | Niagara Central to Omar N Bradley |
| McComb-Pike County/John E Lewis Field (MCB) | Mc Comb | MS | Niagara Central to McComb-Pike County/John E Lewis Field |
| Mackinac Island (MCD) | Mackinac Island | MI | Niagara Central to Mackinac Island |
| Kansas City International (MCI) | Kansas City | MO | Niagara Central to Kansas City International |
| Mccook Ben Nelson Regional (MCK) | Mc Cook | NE | Niagara Central to Mccook Ben Nelson Regional |
| Middle Georgia Regional (MCN) | Macon | GA | Niagara Central to Middle Georgia Regional |
| Orlando International (MCO) | Orlando | FL | Niagara Central to Orlando International |
| Mason City Municipal (MCW) | Mason City | IA | Niagara Central to Mason City Municipal |
| Taylor County (MDF) | Medford | WI | Niagara Central to Taylor County |
| Southern Illinois (MDH) | Carbondale/Murphysboro | IL | Niagara Central to Southern Illinois |
| Madison Municipal (MDN) | Madison | IN | Niagara Central to Madison Municipal |
| Harrisburg International (MDT) | Harrisburg | PA | Niagara Central to Harrisburg International |
| Chicago Midway International (MDW) | Chicago | IL | Niagara Central to Chicago Midway International |
| Meridian/Key Field (MEI) | Meridian | MS | Niagara Central to Meridian/Key Field |
| Port Meadville (MEJ) | Meadville | PA | Niagara Central to Port Meadville |
| Memphis International (MEM) | Memphis | TN | Niagara Central to Memphis International |
| Dare County Regional (MEO) | Manteo | NC | Niagara Central to Dare County Regional |
| Mansfield Lahm Regional (MFD) | Mansfield | OH | Niagara Central to Mansfield Lahm Regional |
| Marshfield Municipal (MFI) | Marshfield | WI | Niagara Central to Marshfield Municipal |
| Accomack County (MFV) | Melfa | VA | Niagara Central to Accomack County |
| Michigan City Municipal-Phillips Field (MGC) | Michigan City | IN | Niagara Central to Michigan City Municipal-Phillips Field |
| Orange County (MGJ) | Montgomery | NY | Niagara Central to Orange County |
| Montgomery Regional/Dannelly Field (MGM) | Montgomery | AL | Niagara Central to Montgomery Regional/Dannelly Field |
| Moultrie Municipal (MGR) | Moultrie | GA | Niagara Central to Moultrie Municipal |
| Morgantown Municipal Walter L Bill Hart Field (MGW) | Morgantown | WV | Niagara Central to Morgantown Municipal Walter L Bill Hart Field |
| Dayton-Wright Brothers (MGY) | Dayton | OH | Niagara Central to Dayton-Wright Brothers |
| Mitchell Municipal (MHE) | Mitchell | SD | Niagara Central to Mitchell Municipal |
| Great Abaco Islands/Marsh Harbour (MHH) | Abaco Islands | | Niagara Central to Great Abaco Islands/Marsh Harbour |
| Manhattan Regional (MHK) | Manhattan | KS | Niagara Central to Manhattan Regional |
| Marshall Memorial Municipal (MHL) | Marshall | MO | Niagara Central to Marshall Memorial Municipal |
| Manchester (MHT) | Manchester | NH | Niagara Central to Manchester |
| Crystal (MIC) | Minneapolis | MN | Niagara Central to Crystal |
| Delaware County Regional (MIE) | Muncie | IN | Niagara Central to Delaware County Regional |
| Miami Regional (MIO) | Miami | OK | Niagara Central to Miami Regional |
| Omaha Millard (MIQ) | Omaha | NE | Niagara Central to Omaha Millard |
| Millville Municipal (MIV) | Millville | NJ | Niagara Central to Millville Municipal |
| Marshalltown Municipal (MIW) | Marshalltown | IA | Niagara Central to Marshalltown Municipal |
| Jackson Municipal (MJQ) | Jackson | MN | Niagara Central to Jackson Municipal |
| Ocean County (MJX) | Toms River | NJ | Niagara Central to Ocean County |
| Charles B Wheeler Downtown (MKC) | Kansas City | MO | Niagara Central to Charles B Wheeler Downtown |
| Milwaukee Mitchell International (MKE) | Milwaukee | WI | Niagara Central to Milwaukee Mitchell International |
| Muskegon County (MKG) | Muskegon | MI | Niagara Central to Muskegon County |
| Mckellar Sipes Regional (MKL) | Jackson | TN | Niagara Central to Mckellar Sipes Regional |
| Muskogee-Davis Regional (MKO) | Muskogee | OK | Niagara Central to Muskogee-Davis Regional |
| Mankato Regional (MKT) | Mankato | MN | Niagara Central to Mankato Regional |
| Melbourne International (MLB) | Melbourne | FL | Niagara Central to Melbourne International |
| Mcalester Regional (MLC) | Mc Alester | OK | Niagara Central to Mcalester Regional |
| Quad City International (MLI) | Moline | IL | Niagara Central to Quad City International |
| Baldwin County Regional (MLJ) | Milledgeville | GA | Niagara Central to Baldwin County Regional |
| Millinocket Municipal (MLT) | Millinocket | ME | Niagara Central to Millinocket Municipal |
| Monroe Regional (MLU) | Monroe | LA | Niagara Central to Monroe Regional |
| Mcminn County (MMI) | Athens | TN | Niagara Central to Mcminn County |
| Southwest Minnesota Regional Marshall/Ryan Field (MML) | Marshall | MN | Niagara Central to Southwest Minnesota Regional Marshall/Ryan Field |
| Marks/Selfs (MMS) | Marks | MS | Niagara Central to Marks/Selfs |
| Morristown Municipal (MMU) | Morristown | NJ | Niagara Central to Morristown Municipal |
| Menominee-Marinette Twin County (MNM) | Menominee | MI | Niagara Central to Menominee-Marinette Twin County |
| Marion Municipal (MNN) | Marion | OH | Niagara Central to Marion Municipal |
| Mobile Regional (MOB) | Mobile | AL | Niagara Central to Mobile Regional |
| Mount Pleasant Municipal (MOP) | Mount Pleasant | MI | Niagara Central to Mount Pleasant Municipal |
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