| Apalachicola Regional (AAF) | Apalachicola | FL | Olney Municipal to Apalachicola Regional |
| Lehigh Valley International (ABE) | Allentown | PA | Olney Municipal to Lehigh Valley International |
| Albuquerque/Sunport International (ABQ) | Albuquerque | NM | Olney Municipal to Albuquerque/Sunport International |
| Aberdeen Regional (ABR) | Aberdeen | SD | Olney Municipal to Aberdeen Regional |
| Southwest Georgia Regional (ABY) | Albany | GA | Olney Municipal to Southwest Georgia Regional |
| Gen Juan Alvarez International (ACA) | Acapulco | Gue | Olney Municipal to Gen Juan Alvarez International |
| Antrim County (ACB) | Bellaire | MI | Olney Municipal to Antrim County |
| Nantucket Memorial (ACK) | Nantucket | MA | Olney Municipal to Nantucket Memorial |
| Ciudad Acuna International (ACN) | Ciudad Acuna | Coa | Olney Municipal to Ciudad Acuna International |
| Waco Regional (ACT) | Waco | TX | Olney Municipal to Waco Regional |
| California Redwood Coast-Humboldt County (ACV) | Arcata | CA | Olney Municipal to California Redwood Coast-Humboldt County |
| Atlantic City International (ACY) | Atlantic City | NJ | Olney Municipal to Atlantic City International |
| Lenawee County (ADG) | Adrian | MI | Olney Municipal to Lenawee County |
| Ardmore Municipal (ADM) | Ardmore | OK | Olney Municipal to Ardmore Municipal |
| Robert F Swinnie (ADR) | Andrews | SC | Olney Municipal to Robert F Swinnie |
| Addison/Dallas (ADS) | Dallas | TX | Olney Municipal to Addison/Dallas |
| Ada Municipal (ADT) | Ada | OK | Olney Municipal to Ada Municipal |
| Albert Lea Municipal (AEL) | Albert Lea | MN | Olney Municipal to Albert Lea Municipal |
| Alexandria International (AEX) | Alexandria | LA | Olney Municipal to Alexandria International |
| Afton Municipal (AFO) | Afton | WY | Olney Municipal to Afton Municipal |
| Allegheny County (AGC) | Pittsburgh | PA | Olney Municipal to Allegheny County |
| Magnolia Municipal (AGO) | Magnolia | AR | Olney Municipal to Magnolia Municipal |
| Augusta Regional/Bush Field (AGS) | Augusta | GA | Olney Municipal to Augusta Regional/Bush Field |
| Aguascalientes/Jesus Teran Intl (AGU) | Aguascalientes | Agu | Olney Municipal to Aguascalientes/Jesus Teran Intl |
| Ardmore Downtown Executive (AHD) | Ardmore | OK | Olney Municipal to Ardmore Downtown Executive |
| Arapahoe Municipal (AHF) | Arapahoe | NE | Olney Municipal to Arapahoe Municipal |
| Amery Municipal (AHH) | Amery | WI | Olney Municipal to Amery Municipal |
| Athens/Ben Epps (AHN) | Athens | GA | Olney Municipal to Athens/Ben Epps |
| Alliance Municipal (AIA) | Alliance | NE | Olney Municipal to Alliance Municipal |
| Anderson Municipal-Darlington Field (AID) | Anderson | IN | Olney Municipal to Anderson Municipal-Darlington Field |
| Aiken Regional (AIK) | Aiken | SC | Olney Municipal to Aiken Regional |
| Atlantic Municipal (AIO) | Atlantic | IA | Olney Municipal to Atlantic Municipal |
| George Downer (AIV) | Aliceville | AL | Olney Municipal to George Downer |
| Lee C Fine Memorial (AIZ) | KAISER/LAKE OZARK | MO | Olney Municipal to Lee C Fine Memorial |
| Akron Fulton International (AKC) | Akron | OH | Olney Municipal to Akron Fulton International |
| Colorado Plains Regional (AKO) | Akron | CO | Olney Municipal to Colorado Plains Regional |
| Fort Mackay (AL4) | Albian | AB | Olney Municipal to Fort Mackay |
| Albany International (ALB) | Albany | NY | Olney Municipal to Albany International |
| Alpine-Casparis Municipal (ALE) | Alpine | TX | Olney Municipal to Alpine-Casparis Municipal |
| Alice International (ALI) | Alice | TX | Olney Municipal to Alice International |
| Alamogordo White Sands Regional (ALM) | Alamogordo | NM | Olney Municipal to Alamogordo White Sands Regional |
| St Louis Regional (ALN) | Alton | IL | Olney Municipal to St Louis Regional |
| Waterloo Regional (ALO) | Waterloo | IA | Olney Municipal to Waterloo Regional |
| San Luis Valley Regional/Bergman Field (ALS) | Alamosa | CO | Olney Municipal to San Luis Valley Regional/Bergman Field |
| Walla Walla Regional (ALW) | Walla Walla | WA | Olney Municipal to Walla Walla Regional |
| Thomas C Russell Field (ALX) | Alexander City | AL | Olney Municipal to Thomas C Russell Field |
| Rick Husband Amarillo International (AMA) | Amarillo | TX | Olney Municipal to Rick Husband Amarillo International |
| Animas Air Park (AMK) | Durango | CO | Olney Municipal to Animas Air Park |
| Gratiot Community (AMN) | Alma | MI | Olney Municipal to Gratiot Community |
| Ames Municipal (AMW) | Ames | IA | Olney Municipal to Ames Municipal |
| Anniston Regional (ANB) | Anniston | AL | Olney Municipal to Anniston Regional |
| Anderson Regional (AND) | Anderson | SC | Olney Municipal to Anderson Regional |
| Tri-State Steuben County (ANQ) | Angola | IN | Olney Municipal to Tri-State Steuben County |
| Ainsworth Regional (ANW) | Ainsworth | NE | Olney Municipal to Ainsworth Regional |
| Anthony Municipal (ANY) | Anthony | KS | Olney Municipal to Anthony Municipal |
| Lima Allen County (AOH) | Lima | OH | Olney Municipal to Lima Allen County |
| Altoona/Blair County (AOO) | Altoona | PA | Olney Municipal to Altoona/Blair County |
| Centennial (APA) | Denver | CO | Olney Municipal to Centennial |
| Napa County (APC) | Napa | CA | Olney Municipal to Napa County |
| Naples Municipal (APF) | Naples | FL | Olney Municipal to Naples Municipal |
| Alpena County Regional (APN) | Alpena | MI | Olney Municipal to Alpena County Regional |
| Marion County-Brown Field (APT) | Jasper | TN | Olney Municipal to Marion County-Brown Field |
| Apple Valley (APV) | Apple Valley | CA | Olney Municipal to Apple Valley |
| New Iberia/Acadiana Regional (ARA) | New Iberia | LA | Olney Municipal to New Iberia/Acadiana Regional |
| Ann Arbor Municipal (ARB) | Ann Arbor | MI | Olney Municipal to Ann Arbor Municipal |
| Walnut Ridge Regional (ARG) | Walnut Ridge | AR | Olney Municipal to Walnut Ridge Regional |
| Watertown International (ART) | Watertown | NY | Olney Municipal to Watertown International |
| Lakeland/Noble F. Lee Memorial Field (ARV) | Minocqua | WI | Olney Municipal to Lakeland/Noble F. Lee Memorial Field |
| Andros Town/Fresh Creek (ASD) | Andros Island | | Olney Municipal to Andros Town/Fresh Creek |
| Aspen-Pitkin County/Sardy Field (ASE) | Aspen | CO | Olney Municipal to Aspen-Pitkin County/Sardy Field |
| Nashua-Boire Field (ASH) | Nashua | NH | Olney Municipal to Nashua-Boire Field |
| Harrison County (ASL) | Marshall | TX | Olney Municipal to Harrison County |
| Talladega Municipal (ASN) | Talladega | AL | Olney Municipal to Talladega Municipal |
| Austin (ASQ) | Austin | NV | Olney Municipal to Austin |
| Astoria Regional (AST) | Astoria | OR | Olney Municipal to Astoria Regional |
| John F Kennedy Memorial (ASX) | Ashland | WI | Olney Municipal to John F Kennedy Memorial |
| Ashley Municipal (ASY) | Ashley | ND | Olney Municipal to Ashley Municipal |
| Arthur's Town (ATC) | Cat Island | | Olney Municipal to Arthur's Town |
| Antlers Municipal (ATE) | Antlers | OK | Olney Municipal to Antlers Municipal |
| Hartsfield Jackson Atlanta International (ATL) | Atlanta | GA | Olney Municipal to Hartsfield Jackson Atlanta International |
| Gordon K Bush Ohio University (ATO) | Athens/Albany | OH | Olney Municipal to Gordon K Bush Ohio University |
| Artesia Municipal (ATS) | Artesia | NM | Olney Municipal to Artesia Municipal |
| Appleton International (ATW) | Appleton | WI | Olney Municipal to Appleton International |
| Watertown Regional (ATY) | Watertown | SD | Olney Municipal to Watertown Regional |
| Vanderhoof (AU4) | Vanderhoof | BC | Olney Municipal to Vanderhoof |
| Augusta State (AUG) | Augusta | ME | Olney Municipal to Augusta State |
| Austin Municipal (AUM) | Austin | MN | Olney Municipal to Austin Municipal |
| Auburn University Regional (AUO) | Auburn | AL | Olney Municipal to Auburn University Regional |
| Austin Bergstrom International (AUS) | Austin | TX | Olney Municipal to Austin Bergstrom International |
| Wausau Downtown (AUW) | Wausau | WI | Olney Municipal to Wausau Downtown |
| Chicago/Aurora Municipal (AUZ) | Chicago | IL | Olney Municipal to Chicago/Aurora Municipal |
| Asheville Regional (AVL) | Asheville | NC | Olney Municipal to Asheville Regional |
| Avon Park Executive (AVO) | Avon Park | FL | Olney Municipal to Avon Park Executive |
| Wilkes-Barre/Scranton International (AVP) | Scranton | PA | Olney Municipal to Wilkes-Barre/Scranton International |
| Marana Regional (AVW) | Tucson | AZ | Olney Municipal to Marana Regional |
| Catalina (AVX) | Avalon | CA | Olney Municipal to Catalina |
| West Memphis Municipal (AWM) | West Memphis | AR | Olney Municipal to West Memphis Municipal |
| Algona Municipal (AXG) | Algona | IA | Olney Municipal to Algona Municipal |
| Chandler Field (AXN) | Alexandria | MN | Olney Municipal to Chandler Field |
| Spring Point (AXP) | Acklins Island | | Olney Municipal to Spring Point |
| Auglaize County Neil Armstrong (AXV) | Wapakoneta | OH | Olney Municipal to Auglaize County Neil Armstrong |
| Angel Fire (Colfax County) (AXX) | Angel Fire | NM | Olney Municipal to Angel Fire (Colfax County) |
| Waycross-Ware County (AYS) | Waycross | GA | Olney Municipal to Waycross-Ware County |
| Phoenix-Mesa Gateway (AZA) | Phoenix | AZ | Olney Municipal to Phoenix-Mesa Gateway |
| Kalamazoo/Battle Creek International (AZO) | Kalamazoo | MI | Olney Municipal to Kalamazoo/Battle Creek International |
| El Catey Presidente Juan Bosch (AZS) | Samana | | Olney Municipal to El Catey Presidente Juan Bosch |
| Barnes Municipal (BAF) | Westfield | MA | Olney Municipal to Barnes Municipal |
| Battle Mountain (BAM) | Battle Mountain | NV | Olney Municipal to Battle Mountain |
| Benson Municipal (BBB) | Benson | MN | Olney Municipal to Benson Municipal |
| Bay City Regional (BBC) | Bay City | TX | Olney Municipal to Bay City Regional |
| Curtis Field (BBD) | Brady | TX | Olney Municipal to Curtis Field |
| Broken Bow Municipal/Keith Glaze Field (BBW) | Broken Bow | NE | Olney Municipal to Broken Bow Municipal/Keith Glaze Field |
| Virginia Tech Montgomery Executive (BCB) | Blacksburg | VA | Olney Municipal to Virginia Tech Montgomery Executive |
| Bryce Canyon (BCE) | Bryce Canyon | UT | Olney Municipal to Bryce Canyon |
| Boca Raton (BCT) | Boca Raton | FL | Olney Municipal to Boca Raton |
| Baudette International (BDE) | Baudette | MN | Olney Municipal to Baudette International |
| Blanding Municipal (BDG) | Blanding | UT | Olney Municipal to Blanding Municipal |
| Bradley International (BDL) | Windsor Locks | CT | Olney Municipal to Bradley International |
| Igor I Sikorsky Memorial (BDR) | Bridgeport | CT | Olney Municipal to Igor I Sikorsky Memorial |
| Beech Factory (BEC) | Wichita | KS | Olney Municipal to Beech Factory |
| Laurence G Hanscom Field (BED) | Bedford | MA | Olney Municipal to Laurence G Hanscom Field |
| Southwest Michigan Regional (BEH) | Benton Harbor | MI | Olney Municipal to Southwest Michigan Regional |
| Bradford Regional (BFD) | Bradford | PA | Olney Municipal to Bradford Regional |
| Western Nebraska Regional/William B Heilig Field (BFF) | Scottsbluff | NE | Olney Municipal to Western Nebraska Regional/William B Heilig Field |
| Bullfrog Basin (BFG) | Glen Canyon | UT | Olney Municipal to Bullfrog Basin |
| King County International Boeing Field (BFI) | Seattle | WA | Olney Municipal to King County International Boeing Field |
| Meadows Field (BFL) | Bakersfield | CA | Olney Municipal to Meadows Field |
| Mobile Downtown (BFM) | Mobile | AL | Olney Municipal to Mobile Downtown |
| Beaver County (BFP) | Beaver Falls | PA | Olney Municipal to Beaver County |
| Virgil I Grissom Municipal (BFR) | Bedford | IN | Olney Municipal to Virgil I Grissom Municipal |
| Beaufort County (BFT) | Beaufort | SC | Olney Municipal to Beaufort County |
| Hutchinson County (BGD) | Borger | TX | Olney Municipal to Hutchinson County |
| Decatur County Industrial Air Park (BGE) | Bainbridge | GA | Olney Municipal to Decatur County Industrial Air Park |
| Greater Binghamton Edwin A Link Field (BGM) | Binghamton | NY | Olney Municipal to Greater Binghamton Edwin A Link Field |
| Bangor International (BGR) | Bangor | ME | Olney Municipal to Bangor International |
| Bagdad (BGT) | Bagdad | AZ | Olney Municipal to Bagdad |
| Hancock County-Bar Harbor (BHB) | Bar Harbor | ME | Olney Municipal to Hancock County-Bar Harbor |
| Birmingham-Shuttlesworth International (BHM) | Birmingham | AL | Olney Municipal to Birmingham-Shuttlesworth International |
| Beatrice Municipal (BIE) | Beatrice | NE | Olney Municipal to Beatrice Municipal |
| Bishop Regional (BIH) | Bishop | CA | Olney Municipal to Bishop Regional |
| Billings Logan International (BIL) | Billings | MT | Olney Municipal to Billings Logan International |
| South Bimini (BIM) | Bimini Islands | | Olney Municipal to South Bimini |
| Bismarck Municipal (BIS) | Bismarck | ND | Olney Municipal to Bismarck Municipal |
| Rocky Mountain Metropolitan/Jeffco (BJC) | Denver | CO | Olney Municipal to Rocky Mountain Metropolitan/Jeffco |
| Bemidji Regional (BJI) | Bemidji | MN | Olney Municipal to Bemidji Regional |
| Wayne County (BJJ) | Wooster | OH | Olney Municipal to Wayne County |
| Leon/Bajio/Guanajuato International (BJX) | Leon | Gua | Olney Municipal to Leon/Bajio/Guanajuato International |
| Baker City Municipal (BKE) | Baker City | OR | Olney Municipal to Baker City Municipal |
| Branson (BKG) | Branson | MO | Olney Municipal to Branson |
| Burke Lakefront (BKL) | Cleveland | OH | Olney Municipal to Burke Lakefront |
| Allen C Perkinson Blackstone Army Air Field (BKT) | Blackstone | VA | Olney Municipal to Allen C Perkinson Blackstone Army Air Field |
| Raleigh County Memorial (BKW) | Beckley | WV | Olney Municipal to Raleigh County Memorial |
| Brookings Regional (BKX) | Brookings | SD | Olney Municipal to Brookings Regional |
| Boulder City Municipal (BLD) | Boulder City | NV | Olney Municipal to Boulder City Municipal |
| Mercer County (BLF) | Bluefield | WV | Olney Municipal to Mercer County |
| Blythe (BLH) | Blythe | CA | Olney Municipal to Blythe |
| Bellingham International (BLI) | Bellingham | WA | Olney Municipal to Bellingham International |
| Monmouth Executive (BLM) | Belmar | NJ | Olney Municipal to Monmouth Executive |
| MidAmerica St Louis Scott AFB (BLV) | Belleville | IL | Olney Municipal to MidAmerica St Louis Scott AFB |
| Brigham City Regional (BMC) | Brigham City | UT | Olney Municipal to Brigham City Regional |
| Monroe County (BMG) | Bloomington | IN | Olney Municipal to Monroe County |
| Central Illinois Regional at Bloomington Normal (BMI) | Bloomington | IL | Olney Municipal to Central Illinois Regional at Bloomington Normal |
| Berlin Regional (BML) | Berlin | NH | Olney Municipal to Berlin Regional |
| Beaumont Municipal (BMT) | Beaumont | TX | Olney Municipal to Beaumont Municipal |
| Nashville International (BNA) | Nashville | TN | Olney Municipal to Nashville International |
| Banning Municipal (BNG) | Banning | CA | Olney Municipal to Banning Municipal |
| Barnwell Regional (BNL) | Barnwell | SC | Olney Municipal to Barnwell Regional |
| Burns Municipal (BNO) | Burns | OR | Olney Municipal to Burns Municipal |
| Boone Municipal (BNW) | Boone | IA | Olney Municipal to Boone Municipal |
| Boise Air Terminal Gowen Field (BOI) | Boise | ID | Olney Municipal to Boise Air Terminal Gowen Field |
| Boston Logan International (BOS) | Boston | MA | Olney Municipal to Boston Logan International |
| Bartow Executive (BOW) | Bartow | FL | Olney Municipal to Bartow Executive |
| Miley Memorial Field (Big Piney) (BPI) | Big Piney | WY | Olney Municipal to Miley Memorial Field (Big Piney) |
| Jack Brooks Regional (BPT) | Beaumont/Port Arthur | TX | Olney Municipal to Jack Brooks Regional |
| Brunswick Golden Isles (BQK) | Brunswick | GA | Olney Municipal to Brunswick Golden Isles |
| Brainerd Lakes Regional (BRD) | Brainerd | MN | Olney Municipal to Brainerd Lakes Regional |
| Southeast Iowa Regional (BRL) | Burlington | IA | Olney Municipal to Southeast Iowa Regional |
| Brownsville/South Padre Island International (BRO) | Brownsville | TX | Olney Municipal to Brownsville/South Padre Island International |
| Samuels Field (BRY) | Bardstown | KY | Olney Municipal to Samuels Field |
| Bisbee Municipal (BSQ) | Bisbee | AZ | Olney Municipal to Bisbee Municipal |
| Skypark (BTF) | Bountiful | UT | Olney Municipal to Skypark |
| Battle Creek Executive (BTL) | Battle Creek | MI | Olney Municipal to Battle Creek Executive |
| Bert Mooney (BTM) | Butte | MT | Olney Municipal to Bert Mooney |
| Marlboro County Jetport - H.E. Avent Field (BTN) | Bennettsville | SC | Olney Municipal to Marlboro County Jetport - H.E. Avent Field |
| Pittsburgh/Butler Regional Airport (BTP) | Butler | PA | Olney Municipal to Pittsburgh/Butler Regional Airport |
| Baton Rouge Metro Ryan Field (BTR) | Baton Rouge | LA | Olney Municipal to Baton Rouge Metro Ryan Field |
| Burlington International (BTV) | Burlington | VT | Olney Municipal to Burlington International |
| Beatty (BTY) | Beatty | NV | Olney Municipal to Beatty |
| Cram Field (BUB) | Burwell | NE | Olney Municipal to Cram Field |
| Buffalo Niagara International (BUF) | Buffalo | NY | Olney Municipal to Buffalo Niagara International |
| Butler Memorial (BUM) | Butler | MO | Olney Municipal to Butler Memorial |
| Hollywood Burbank (BUR) | Burbank | CA | Olney Municipal to Hollywood Burbank |
| Bartlesville Municipal (BVO) | Bartlesville | OK | Olney Municipal to Bartlesville Municipal |
| Batesville Regional (BVX) | Batesville | AR | Olney Municipal to Batesville Regional |
| Beverly Regional (BVY) | Beverly | MA | Olney Municipal to Beverly Regional |
| Brawley Municipal (BWC) | Brawley | CA | Olney Municipal to Brawley Municipal |
| Brownwood Regional (BWD) | Brownwood | TX | Olney Municipal to Brownwood Regional |
| Bowling Green Warren County Regional (BWG) | Bowling Green | KY | Olney Municipal to Bowling Green Warren County Regional |
| Baltimore/Washington Intl Thurgood Marshall (BWI) | Baltimore | MD | Olney Municipal to Baltimore/Washington Intl Thurgood Marshall |
| Bowman Municipal (BWM) | Bowman | ND | Olney Municipal to Bowman Municipal |
| George R Carr Memorial Airfield (BXA) | Bogalusa | LA | Olney Municipal to George R Carr Memorial Airfield |
| Buckeye Municipal (BXK) | Buckeye | AZ | Olney Municipal to Buckeye Municipal |
| Borrego Valley (BXS) | Borrego Springs | CA | Olney Municipal to Borrego Valley |
| Johnson County (BYG) | Buffalo | WY | Olney Municipal to Johnson County |
| Arkansas International (BYH) | Blytheville | AR | Olney Municipal to Arkansas International |
| Burley Municipal (BYI) | Burley | ID | Olney Municipal to Burley Municipal |
| Bozeman Yellowstone International (BZN) | Bozeman | MT | Olney Municipal to Bozeman Yellowstone International |
| Wexford County (CAD) | Cadillac | MI | Olney Municipal to Wexford County |
| Columbia Metropolitan (CAE) | Columbia | SC | Olney Municipal to Columbia Metropolitan |
| Akron/Canton Regional (CAK) | Akron | OH | Olney Municipal to Akron/Canton Regional |
| Clayton Municipal Airpark (CAO) | Clayton | NM | Olney Municipal to Clayton Municipal Airpark |
| Cap Haitien (CAP) | Cap Haitien | | Olney Municipal to Cap Haitien |
| Greater Cumberland Regional (CBE) | Cumberland | MD | Olney Municipal to Greater Cumberland Regional |
| Council Bluffs Municipal (CBF) | Council Bluffs | IA | Olney Municipal to Council Bluffs Municipal |
| Shalz Field (CBK) | Colby | KS | Olney Municipal to Shalz Field |
| Clinton Municipal (CCA) | Clinton | AR | Olney Municipal to Clinton Municipal |
| Cable (CCB) | Upland | CA | Olney Municipal to Cable |
| Crane County (CCG) | Crane | TX | Olney Municipal to Crane County |
| Buchanan Field (CCR) | Concord | CA | Olney Municipal to Buchanan Field |
| Northeast Iowa Regional (CCY) | Charles City | IA | Olney Municipal to Northeast Iowa Regional |
| Chub Cay (CCZ) | Berry Islands | | Olney Municipal to Chub Cay |
| Cedar City Regional (CDC) | Cedar City | UT | Olney Municipal to Cedar City Regional |
| Harrell Field (CDH) | Camden | AR | Olney Municipal to Harrell Field |
| Woodward Field (CDN) | Camden | SC | Olney Municipal to Woodward Field |
| Chadron Municipal (CDR) | Chadron | NE | Olney Municipal to Chadron Municipal |
| Childress Municipal (CDS) | Childress | TX | Olney Municipal to Childress Municipal |
| Essex County (CDW) | Caldwell | NJ | Olney Municipal to Essex County |
| Cessna Aircraft Field (CEA) | Wichita | KS | Olney Municipal to Cessna Aircraft Field |
| Del Norte Co Regional/Jack Mcnamara Field (CEC) | Crescent City | CA | Olney Municipal to Del Norte Co Regional/Jack Mcnamara Field |
| Westover Arb/Westover Metropolitan (CEF) | Chicopee | MA | Olney Municipal to Westover Arb/Westover Metropolitan |
| Ciudad Obregon International (CEN) | Ciudad Obregon | Son | Olney Municipal to Ciudad Obregon International |
| Oconee County Regional (CEU) | Clemson | SC | Olney Municipal to Oconee County Regional |
| Mettel Field (CEV) | Connersville | IN | Olney Municipal to Mettel Field |
| Bob Sikes (CEW) | Crestview | FL | Olney Municipal to Bob Sikes |
| Kyle-Oakley Field (CEY) | Murray | KY | Olney Municipal to Kyle-Oakley Field |
| Cortez Municipal (CEZ) | Cortez | CO | Olney Municipal to Cortez Municipal |
| Coulter Field (CFD) | Bryan | TX | Olney Municipal to Coulter Field |
| Greenlee County (CFT) | Clifton | AZ | Olney Municipal to Greenlee County |
| Coffeyville Municipal (CFV) | Coffeyville | KS | Olney Municipal to Coffeyville Municipal |
| Cambridge-Dorchester Regional (CGE) | Cambridge | MD | Olney Municipal to Cambridge-Dorchester Regional |
| Cuyahoga County (CGF) | Cleveland | OH | Olney Municipal to Cuyahoga County |
| Cape Girardeau Regional (CGI) | Cape Girardeau | MO | Olney Municipal to Cape Girardeau Regional |
| Casa Grande Municipal (CGZ) | Casa Grande | AZ | Olney Municipal to Casa Grande Municipal |
| Lovell Field (CHA) | Chattanooga | TN | Olney Municipal to Lovell Field |
| Chickasha Municipal (CHK) | Chickasha | OK | Olney Municipal to Chickasha Municipal |
| Challis (CHL) | Challis | ID | Olney Municipal to Challis |
| Charlottesville Albemarle (CHO) | Charlottesville | VA | Olney Municipal to Charlottesville Albemarle |
| Charleston International (CHS) | Charleston | SC | Olney Municipal to Charleston International |
| Chico Municipal (CIC) | Chico | CA | Olney Municipal to Chico Municipal |
| The Eastern Iowa (CID) | Cedar Rapids | IA | Olney Municipal to The Eastern Iowa |
| Craig-Moffat (CIG) | Craig | CO | Olney Municipal to Craig-Moffat |
| Arthur N Neu (CIN) | Carroll | IA | Olney Municipal to Arthur N Neu |
| Cairo Regional (CIR) | Cairo | IL | Olney Municipal to Cairo Regional |
| Chippewa County International (CIU) | Sault Ste Marie | MI | Olney Municipal to Chippewa County International |
| Ciudad Juarez/Abraham Gonzalez Intl (CJS) | Ciudad Juarez | Chi | Olney Municipal to Ciudad Juarez/Abraham Gonzalez Intl |
| North Central West Virginia (CKB) | Clarksburg | WV | Olney Municipal to North Central West Virginia |
| Fletcher Field (CKM) | Clarksdale | MS | Olney Municipal to Fletcher Field |
| Crookston Municipal Kirkwood Field (CKN) | Crookston | MN | Olney Municipal to Crookston Municipal Kirkwood Field |
| Outlaw Field (CKV) | Clarksville | TN | Olney Municipal to Outlaw Field |
| Carlsbad/McClellan-Palomar (CLD) | Carlsbad | CA | Olney Municipal to Carlsbad/McClellan-Palomar |
| Cleveland/Hopkins International (CLE) | Cleveland | OH | Olney Municipal to Cleveland/Hopkins International |
| New Coalinga Municipal (CLG) | Coalinga | CA | Olney Municipal to New Coalinga Municipal |
| Clintonville Municipal (CLI) | Clintonville | WI | Olney Municipal to Clintonville Municipal |
| Clinton Regional (CLK) | Clinton | OK | Olney Municipal to Clinton Regional |
| Easterwood Field (CLL) | College Station | TX | Olney Municipal to Easterwood Field |
| William R Fairchild International (CLM) | Port Angeles | WA | Olney Municipal to William R Fairchild International |
| Colima (CLQ) | Colima | Col | Olney Municipal to Colima |
| Cliff Hatfield Memorial (CLR) | Calipatria | CA | Olney Municipal to Cliff Hatfield Memorial |
| Chehalis-Centralia (CLS) | Chehalis | WA | Olney Municipal to Chehalis-Centralia |
| Charlotte Douglas International (CLT) | Charlotte | NC | Olney Municipal to Charlotte Douglas International |
| Columbus Municipal (CLU) | Columbus | IN | Olney Municipal to Columbus Municipal |
| Clearwater Airpark (CLW) | Clearwater | FL | Olney Municipal to Clearwater Airpark |
| Ciudad Del Carmen (CME) | Ciudad del Carmen | Cam | Olney Municipal to Ciudad Del Carmen |
| John Glenn International (CMH) | Columbus | OH | Olney Municipal to John Glenn International |
| University of Illinois-Willard (CMI) | Champaign/Urbana | IL | Olney Municipal to University of Illinois-Willard |
| Houghton County Memorial (CMX) | Hancock | MI | Olney Municipal to Houghton County Memorial |
| Sparta/Fort Mccoy (CMY) | Sparta | WI | Olney Municipal to Sparta/Fort Mccoy |
| Fremont County (CNE) | Canon City | CO | Olney Municipal to Fremont County |
| Blosser Municipal (CNK) | Concordia | KS | Olney Municipal to Blosser Municipal |
| Cavern City Air Terminal (CNM) | Carlsbad | NM | Olney Municipal to Cavern City Air Terminal |
| Chino (CNO) | Chino | CA | Olney Municipal to Chino |
| Chanute Martin Johnson (CNU) | Chanute | KS | Olney Municipal to Chanute Martin Johnson |
| Waco Texas State Techical College (CNW) | Waco | TX | Olney Municipal to Waco Texas State Techical College |
| Canyonlands Field (CNY) | Moab | UT | Olney Municipal to Canyonlands Field |
| Columbia (COA) | Columbia | CA | Olney Municipal to Columbia |
| Yellowstone Regional (COD) | Cody | WY | Olney Municipal to Yellowstone Regional |
| Coeur D'alene/Pappy Boyington Field (COE) | Coeur D'Alene | ID | Olney Municipal to Coeur D'alene/Pappy Boyington Field |
| Merritt Island (COI) | Merritt Island | FL | Olney Municipal to Merritt Island |
| Coleman Municipal (COM) | Coleman | TX | Olney Municipal to Coleman Municipal |
| Concord Municipal (CON) | Concord | NH | Olney Municipal to Concord Municipal |
| City of Colorado Springs Municipal (COS) | Colorado Springs | CO | Olney Municipal to City of Colorado Springs Municipal |
| Cotulla-La Salle County (COT) | Cotulla | TX | Olney Municipal to Cotulla-La Salle County |
| Columbia Regional (COU) | Columbia | MO | Olney Municipal to Columbia Regional |
| Congo Town (COX) | Andros Island | | Olney Municipal to Congo Town |
| Campeche/Ignacio Acuna Ongay Intl (CPE) | Campeche | Cam | Olney Municipal to Campeche/Ignacio Acuna Ongay Intl |
| Compton/Woodley (CPM) | Compton | CA | Olney Municipal to Compton/Woodley |
| Casper/Natrona County International (CPR) | Casper | WY | Olney Municipal to Casper/Natrona County International |
| St Louis Downtown (CPS) | Cahokia/St Louis | IL | Olney Municipal to St Louis Downtown |
| Debert (CQ3) | Debert | NS | Olney Municipal to Debert |
| Florenceville (CR3) | Florenceville | NB | Olney Municipal to Florenceville |
| Grand Strand North Myrtle Beach (CRE) | North Myrtle Beach | SC | Olney Municipal to Grand Strand North Myrtle Beach |
| Jacksonville Executive at Craig (CRG) | Jacksonville | FL | Olney Municipal to Jacksonville Executive at Craig |
| Colonel Hill (CRI) | Crooked Island | | Olney Municipal to Colonel Hill |
| Corpus Christi International (CRP) | Corpus Christi | TX | Olney Municipal to Corpus Christi International |
| C David Campbell Field-Corsicana Municipal (CRS) | Corsicana | TX | Olney Municipal to C David Campbell Field-Corsicana Municipal |
| Z M Jack Stell Field (CRT) | Crossett | AR | Olney Municipal to Z M Jack Stell Field |
| Yeager (CRW) | Charleston | WV | Olney Municipal to Yeager |
| Roscoe Turner (CRX) | Corinth | MS | Olney Municipal to Roscoe Turner |
| Columbus Metropolitan (CSG) | Columbus | GA | Olney Municipal to Columbus Metropolitan |
| Cabo San Lucas International (CSL) | Los Cabos | Baj | Olney Municipal to Cabo San Lucas International |
| Clinton-Sherman (CSM) | Clinton | OK | Olney Municipal to Clinton-Sherman |
| Carson City (CSN) | Carson City | NV | Olney Municipal to Carson City |
| Creston Municipal (CSQ) | Creston | IA | Olney Municipal to Creston Municipal |
| Crossville Memorial/Whitson Field (CSV) | Crossville | TN | Olney Municipal to Crossville Memorial/Whitson Field |
| Cut Bank International (CTB) | Cut Bank | MT | Olney Municipal to Cut Bank International |
| Chester County G O Carlson (CTH) | Coatesville | PA | Olney Municipal to Chester County G O Carlson |
| Canton Municipal (CTK) | Canton | SD | Olney Municipal to Canton Municipal |
| Chetumal Intl (CTM) | Chetumal | Qui | Olney Municipal to Chetumal Intl |
| Cottonwood (CTW) | Cottonwood | AZ | Olney Municipal to Cottonwood |
| Cross City (CTY) | Cross City | FL | Olney Municipal to Cross City |
| Clinton-Sampson County (CTZ) | Clinton | NC | Olney Municipal to Clinton-Sampson County |
| Jim Hamilton L.B. Owens (CUB) | Columbia | SC | Olney Municipal to Jim Hamilton L.B. Owens |
| Cushing Municipal (CUH) | Cushing | OK | Olney Municipal to Cushing Municipal |
| Culiacan (CUL) | Culiacan | Sin | Olney Municipal to Culiacan |
| Cancun International (CUN) | Cancun | Qui | Olney Municipal to Cancun International |
| Chihuahua/Gen R Fierro Villalobos (CUU) | Chihuahua | Chi | Olney Municipal to Chihuahua/Gen R Fierro Villalobos |
| Cincinnati Northern Kentucky International (CVG) | Cincinnati | OH | Olney Municipal to Cincinnati Northern Kentucky International |
| Cuernavaca/Gen Mariano Matamoros (CVJ) | Cuernavaca | Mor | Olney Municipal to Cuernavaca/Gen Mariano Matamoros |
| General Pedro J Mendez/Ciudad Victoria Intl (CVM) | Ciudad Victoria | Tam | Olney Municipal to General Pedro J Mendez/Ciudad Victoria Intl |
| Clovis Municipal (CVN) | Clovis | NM | Olney Municipal to Clovis Municipal |
| Corvallis Municipal (CVO) | Corvallis | OR | Olney Municipal to Corvallis Municipal |
| Central Wisconsin (CWA) | Mosinee | WI | Olney Municipal to Central Wisconsin |
| Chennault International (CWF) | Lake Charles | LA | Olney Municipal to Chennault International |
| Clinton Municipal (CWI) | Clinton | IA | Olney Municipal to Clinton Municipal |
| Cochise County (CWX) | Willcox | AZ | Olney Municipal to Cochise County |
| Calexico International (CXL) | Calexico | CA | Olney Municipal to Calexico International |
| Conroe North Houston Regional (CXO) | Houston | TX | Olney Municipal to Conroe North Houston Regional |
| Charles Kirkconnell Intl (CYB) | Cayman Brac | | Olney Municipal to Charles Kirkconnell Intl |
| Cheyenne Regional/Jerry Olson Field (CYS) | Cheyenne | WY | Olney Municipal to Cheyenne Regional/Jerry Olson Field |
| Celaya (CYW) | Celaya | Gua | Olney Municipal to Celaya |
| Nuevo Chichen Itza (CZA) | Chichen Itza | Yuc | Olney Municipal to Nuevo Chichen Itza |
| Boundary Bay (CZBB) | Vancouver | BC | Olney Municipal to Boundary Bay |
| Cozumel Intl (CZM) | Cozumel | Qui | Olney Municipal to Cozumel Intl |
| Dimmit County (CZT) | Carrizo Springs | TX | Olney Municipal to Dimmit County |
| Daytona Beach International (DAB) | Daytona Beach | FL | Olney Municipal to Daytona Beach International |
| Barstow-Daggett (DAG) | Daggett | CA | Olney Municipal to Barstow-Daggett |
| Dallas Love Field (DAL) | Dallas | TX | Olney Municipal to Dallas Love Field |
| Danville Regional (DAN) | Danville | VA | Olney Municipal to Danville Regional |
| Dayton International James M Cox (DAY) | Dayton | OH | Olney Municipal to Dayton International James M Cox |
| Dublin W H Bud Barron (DBN) | Dublin | GA | Olney Municipal to Dublin W H Bud Barron |
| Dubuque Regional (DBQ) | Dubuque | IA | Olney Municipal to Dubuque Regional |
| Pryor Field Regional (DCU) | Decatur | AL | Olney Municipal to Pryor Field Regional |
| Dodge City Regional (DDC) | Dodge City | KS | Olney Municipal to Dodge City Regional |
| Decatur (DEC) | Decatur | IL | Olney Municipal to Decatur |
| Decorah Municipal (DEH) | Decorah | IA | Olney Municipal to Decorah Municipal |
| Denver International (DEN) | Denver | CO | Olney Municipal to Denver International |
| Coleman A Young Municipal (DET) | Detroit | MI | Olney Municipal to Coleman A Young Municipal |
| Defiance Memorial (DFI) | Defiance | OH | Olney Municipal to Defiance Memorial |
| Dallas-Fort Worth International (DFW) | Dallas | TX | Olney Municipal to Dallas-Fort Worth International |
| Douglas Municipal (DGL) | Douglas | AZ | Olney Municipal to Douglas Municipal |
| Durango (DGO) | Durango | Dur | Olney Municipal to Durango |
| Converse County (DGW) | Douglas | WY | Olney Municipal to Converse County |
| Dothan Regional (DHN) | Dothan | AL | Olney Municipal to Dothan Regional |
| Dalhart Municipal (DHT) | Dalhart | TX | Olney Municipal to Dalhart Municipal |
| Dickinson Theodore Roosevelt Regional (DIK) | Dickinson | ND | Olney Municipal to Dickinson Theodore Roosevelt Regional |
| Chautauqua County/Dunkirk (DKK) | Dunkirk | NY | Olney Municipal to Chautauqua County/Dunkirk |
| Duluth International (DLH) | Duluth | MN | Olney Municipal to Duluth International |
| Dillon County Airport (DLL) | Dillon | SD | Olney Municipal to Dillon County Airport |
| Dillon (DLN) | Dillon | MT | Olney Municipal to Dillon |
| The Dalles Municipal/Columbia Gorge Regional (DLS) | The Dalles | OR | Olney Municipal to The Dalles Municipal/Columbia Gorge Regional |
| Deming Municipal (DMN) | Deming | NM | Olney Municipal to Deming Municipal |
| Sedalia Regional (DMO) | Sedalia | MO | Olney Municipal to Sedalia Regional |
| Daniel Field (DNL) | Augusta | GA | Olney Municipal to Daniel Field |
| Dalton Municipal (DNN) | Dalton | GA | Olney Municipal to Dalton Municipal |
| Denison Municipal (DNS) | Denison | IA | Olney Municipal to Denison Municipal |
| Vermilion Regional (DNV) | Danville | IL | Olney Municipal to Vermilion Regional |
| Dover AFB (DOV) | Dover | DE | Olney Municipal to Dover AFB |
| Dupage (DPA) | Chicago | IL | Olney Municipal to Dupage |
| Drummond Island (DRE) | Drummond Island | MI | Olney Municipal to Drummond Island |
| Beauregard Regional (DRI) | De Ridder | LA | Olney Municipal to Beauregard Regional |
| Durango/La Plata County (DRO) | Durango | CO | Olney Municipal to Durango/La Plata County |
| Del Rio International (DRT) | Del Rio | TX | Olney Municipal to Del Rio International |
| Destin Executive (DSI) | Destin | FL | Olney Municipal to Destin Executive |
| Des Moines International (DSM) | Des Moines | IA | Olney Municipal to Des Moines International |
| Delta Municipal (DTA) | Delta | UT | Olney Municipal to Delta Municipal |
| Detroit Lakes-Wething Field (DTL) | Detroit Lakes | MN | Olney Municipal to Detroit Lakes-Wething Field |
| Shreveport Downtown (DTN) | Shreveport | LA | Olney Municipal to Shreveport Downtown |
| Detroit Metro Wayne County (DTW) | Detroit | MI | Olney Municipal to Detroit Metro Wayne County |
| Durant Regional - Eaker Field (DUA) | Durant | OK | Olney Municipal to Durant Regional - Eaker Field |
| Bisbee Douglas International (DUG) | Douglas/Bisbee | AZ | Olney Municipal to Bisbee Douglas International |
| Dubois Regional (DUJ) | DuBois | PA | Olney Municipal to Dubois Regional |
| Devils Lake Regional (DVL) | Devils Lake | ND | Olney Municipal to Devils Lake Regional |
| Davenport Municipal (DVN) | Davenport | IA | Olney Municipal to Davenport Municipal |
| Phoenix Deer Valley (DVT) | Phoenix | AZ | Olney Municipal to Phoenix Deer Valley |
| David Wayne Hooks Memorial (DWH) | Houston | TX | Olney Municipal to David Wayne Hooks Memorial |
| Danbury Municipal (DXR) | Danbury | CT | Olney Municipal to Danbury Municipal |
| Phifer Airfield (EAN) | Wheatland | WY | Olney Municipal to Phifer Airfield |
| Kearney Regional (EAR) | Kearney | NE | Olney Municipal to Kearney Regional |
| Pangborn Memorial (EAT) | Wenatchee | WA | Olney Municipal to Pangborn Memorial |
| Chippewa Valley Regional (EAU) | Eau Claire | WI | Olney Municipal to Chippewa Valley Regional |
| Webster City Municipal (EBS) | Webster City | IA | Olney Municipal to Webster City Municipal |
| Iosco County (ECA) | East Tawas | MI | Olney Municipal to Iosco County |
| Elizabeth City Regional & Coast Guard Station (ECG) | Elizabeth City | NC | Olney Municipal to Elizabeth City Regional & Coast Guard Station |
| Northwest Florida Beaches International (ECP) | Panama City | FL | Olney Municipal to Northwest Florida Beaches International |
| Mondell Field (ECS) | Newcastle | WY | Olney Municipal to Mondell Field |
| Northeastern Regional (EDE) | Edenton | NC | Olney Municipal to Northeastern Regional |
| El Dorado/Captain Jack Thomas Memorial (EDK) | El Dorado | KS | Olney Municipal to El Dorado/Captain Jack Thomas Memorial |
| Needles (EED) | Needles | CA | Olney Municipal to Needles |
| Dilliant-Hopkins (EEN) | Keene | NH | Olney Municipal to Dilliant-Hopkins |
| Airdrie (EF4) | Airdrie | AB | Olney Municipal to Airdrie |
| Ellington (EFD) | Houston | TX | Olney Municipal to Ellington |
| Northeast Kingdom International (EFK) | Newport | VT | Olney Municipal to Northeast Kingdom International |
| Jefferson Municipal (EFW) | Jefferson | IA | Olney Municipal to Jefferson Municipal |
| Eagle County Regional (EGE) | Eagle | CO | Olney Municipal to Eagle County Regional |
| Maverick County Memorial International (EGP) | Eagle Pass | TX | Olney Municipal to Maverick County Memorial International |
| Eagle River Union (EGV) | Eagle River | WI | Olney Municipal to Eagle River Union |
| Provost (EH6) | Provost | AB | Olney Municipal to Provost |
| Elkhart Municipal (EKI) | Elkhart | IN | Olney Municipal to Elkhart Municipal |
| Elkins/Randolph County (EKN) | Elkins | WV | Olney Municipal to Elkins/Randolph County |
| Elko Regional/Harris Field (EKO) | Elko | NV | Olney Municipal to Elko Regional/Harris Field |
| Addington Field (EKX) | Elizabethtown | KY | Olney Municipal to Addington Field |
| Eagle Lake (ELA) | Eagle Lake | TX | Olney Municipal to Eagle Lake |
| South Arkansas Regional at Goodwin Field (ELD) | El Dorado | AR | Olney Municipal to South Arkansas Regional at Goodwin Field |
| North Eleuthera (ELH) | Eleuthera Island | | Olney Municipal to North Eleuthera |
| Elk City Regional Business (ELK) | Elk City | OK | Olney Municipal to Elk City Regional Business |
| Elmira/Corning Regional (ELM) | Elmira | NY | Olney Municipal to Elmira/Corning Regional |
| Bowers Field (ELN) | Ellensburg | WA | Olney Municipal to Bowers Field |
| El Paso International (ELP) | El Paso | TX | Olney Municipal to El Paso International |
| Ely/Yelland Field (ELY) | Ely | NV | Olney Municipal to Ely/Yelland Field |
| Wellsville Municipal/Tarantine Field (ELZ) | Wellsville | NY | Olney Municipal to Wellsville Municipal/Tarantine Field |
| Kemmerer Municipal (EMM) | Kemmerer | WY | Olney Municipal to Kemmerer Municipal |
| Emporia Municipal (EMP) | Emporia | KS | Olney Municipal to Emporia Municipal |
| San Gabriel Valley (EMT) | El Monte | CA | Olney Municipal to San Gabriel Valley |
| Centralia Municipal (ENL) | Centralia | IL | Olney Municipal to Centralia Municipal |
| Wendover (ENV) | Wendover | UT | Olney Municipal to Wendover |
| Kenosha Regional (ENW) | Kenosha | WI | Olney Municipal to Kenosha Regional |
| Keokuk Municipal (EOK) | Keokuk | IA | Olney Municipal to Keokuk Municipal |
| Neosho Hugh Robinson (EOS) | Neosho | MO | Olney Municipal to Neosho Hugh Robinson |
| Ephrata Municipal (EPH) | Ephrata | WA | Olney Municipal to Ephrata Municipal |
| Erie International/Tom Ridge Field (ERI) | Erie | PA | Olney Municipal to Erie International/Tom Ridge Field |
| Kerrville Municipal/Louis Schreiner Field (ERV) | Kerrville | TX | Olney Municipal to Kerrville Municipal/Louis Schreiner Field |
| Delta County (ESC) | Escanaba | MI | Olney Municipal to Delta County |
| Ensenada/Gen Alberto Salinas (ESE) | Ensenada | Baj | Olney Municipal to Ensenada/Gen Alberto Salinas |
| Esler Regional (ESF) | Alexandria | LA | Olney Municipal to Esler Regional |
| Easton/Newnam Field (ESN) | Easton | MD | Olney Municipal to Easton/Newnam Field |
| Ohkay Owingeh (ESO) | Espanola | NM | Olney Municipal to Ohkay Owingeh |
| Estherville Municipal (EST) | Estherville | IA | Olney Municipal to Estherville Municipal |
| West Bend Municipal (ETB) | West Bend | WI | Olney Municipal to West Bend Municipal |
| Enterprise Municipal (ETS) | Enterprise | AL | Olney Municipal to Enterprise Municipal |
| Eureka (EUE) | Eureka | NV | Olney Municipal to Eureka |
| Weedon Field (EUF) | Eufaula | AL | Olney Municipal to Weedon Field |
| Mahlon Sweet Field (EUG) | Eugene | OR | Olney Municipal to Mahlon Sweet Field |
| Eveleth-Virginia Municipal (EVM) | Eveleth | MN | Olney Municipal to Eveleth-Virginia Municipal |
| Evansville Regional (EVV) | Evansville | IN | Olney Municipal to Evansville Regional |
| Evanston-Uinta County Burns Field (EVW) | Evanston | WY | Olney Municipal to Evanston-Uinta County Burns Field |
| New Bedford Regional (EWB) | New Bedford | MA | Olney Municipal to New Bedford Regional |
| Newton City County (EWK) | Newton | KS | Olney Municipal to Newton City County |
| Coastal Carolina Regional (EWN) | New Bern | NC | Olney Municipal to Coastal Carolina Regional |
| Newark Liberty International (EWR) | Newark | NJ | Olney Municipal to Newark Liberty International |
| Yerington Municipal (EYR) | Yerington | NV | Olney Municipal to Yerington Municipal |
| Key West International (EYW) | Key West | FL | Olney Municipal to Key West International |
| Farmington Regional (FAM) | Farmington | MO | Olney Municipal to Farmington Regional |
| Hector International Fargo (FAR) | Fargo | ND | Olney Municipal to Hector International Fargo |
| Fresno Yosemite International (FAT) | Fresno | CA | Olney Municipal to Fresno Yosemite International |
| Fayetteville Regional/Grannis Field (FAY) | Fayetteville | NC | Olney Municipal to Fayetteville Regional/Grannis Field |
| Faribault Municipal (FBL) | Faribault | MN | Olney Municipal to Faribault Municipal |
| Fort Bridger Airport (FBR) | Fort Bridger | WY | Olney Municipal to Fort Bridger Airport |
| Fairbury Municipal (FBY) | Fairbury | NE | Olney Municipal to Fairbury Municipal |
| Glacier Park International (FCA) | Kalispell | MT | Olney Municipal to Glacier Park International |
| Flying Cloud (FCM) | Minneapolis | MN | Olney Municipal to Flying Cloud |
| Forrest City Municipal (FCY) | Forrest City | AR | Olney Municipal to Forrest City Municipal |
| Frederick Municipal (FDK) | Frederick | MD | Olney Municipal to Frederick Municipal |
| Findlay (FDY) | Findlay | OH | Olney Municipal to Findlay |
| Albertus (FEP) | Freeport | IL | Olney Municipal to Albertus |
| Fremont Municipal (FET) | Fremont | NE | Olney Municipal to Fremont Municipal |
| Fairfield Municipal (FFL) | Fairfield | IA | Olney Municipal to Fairfield Municipal |
| Fergus Falls Municipal-Einar Mickelson Field (FFM) | Fergus Falls | MN | Olney Municipal to Fergus Falls Municipal-Einar Mickelson Field |
| Capital City (FFT) | Frankfort | KY | Olney Municipal to Capital City |
| Sierra Vista Municipal/Libby AAF (FHU) | Fort Huachuca | AZ | Olney Municipal to Sierra Vista Municipal/Libby AAF |
| Fillmore Municipal (FIL) | Fillmore | UT | Olney Municipal to Fillmore Municipal |
| Venango Regional (FKL) | Franklin | PA | Olney Municipal to Venango Regional |
| Franklin Municipal-John Beverly Rose (FKN) | Franklin | VA | Olney Municipal to Franklin Municipal-John Beverly Rose |
| Fond Du Lac County (FLD) | Fond Du Lac | WI | Olney Municipal to Fond Du Lac County |
| Flagstaff Pulliam (FLG) | Flagstaff | AZ | Olney Municipal to Flagstaff Pulliam |
| Fort Lauderdale Hollywood International (FLL) | Fort Lauderdale | FL | Olney Municipal to Fort Lauderdale Hollywood International |
| Florence Regional (FLO) | Florence | SC | Olney Municipal to Florence Regional |
| Marion County Regional (FLP) | Flippin | AR | Olney Municipal to Marion County Regional |
| Sherman Army Airfield (FLV) | Fort Leavenworth | KS | Olney Municipal to Sherman Army Airfield |
| Fallon Municipal (FLX) | Fallon | NV | Olney Municipal to Fallon Municipal |
| Four Corners Regional (FMN) | Farmington | NM | Olney Municipal to Four Corners Regional |
| Fort Madison Municipal (FMS) | Fort Madison | IA | Olney Municipal to Fort Madison Municipal |
| Page Field (FMY) | Fort Myers | FL | Olney Municipal to Page Field |
| Northern Colorado Regional (FNL) | Ft Collins/Loveland | CO | Olney Municipal to Northern Colorado Regional |
| Bishop International (FNT) | Flint | MI | Olney Municipal to Bishop International |
| Fort Dodge Regional (FOD) | Fort Dodge | IA | Olney Municipal to Fort Dodge Regional |
| Topeka Regional (FOE) | Topeka | KS | Olney Municipal to Topeka Regional |
| Francis S Gabreski (FOK) | Westhampton Beach | NY | Olney Municipal to Francis S Gabreski |
| Grand Bahama International (FPO) | Freeport | | Olney Municipal to Grand Bahama International |
| Treasure Coast International (FPR) | Fort Pierce | FL | Olney Municipal to Treasure Coast International |
| Perry-Foley (FPY) | Perry | FL | Olney Municipal to Perry-Foley |
| Republic Long Island (FRG) | Farmingdale | NY | Olney Municipal to Republic Long Island |
| French Lick Municipal (FRH) | French Lick | IN | Olney Municipal to French Lick Municipal |
| Fairmont Municipal (FRM) | Fairmont | MN | Olney Municipal to Fairmont Municipal |
| Eastern Slopes Regional (FRY) | Fryeburg | ME | Olney Municipal to Eastern Slopes Regional |
| Loon River (FS6) | Loon River | AB | Olney Municipal to Loon River |
| Sioux Falls Regional, Joe Foss Field (FSD) | Sioux Falls | SD | Olney Municipal to Sioux Falls Regional, Joe Foss Field |
| Fort Scott Municipal (FSK) | Fort Scott | KS | Olney Municipal to Fort Scott Municipal |
| Fort Smith Regional (FSM) | Fort Smith | AR | Olney Municipal to Fort Smith Regional |
| Fort Stockton-Pecos County (FST) | Fort Stockton | TX | Olney Municipal to Fort Stockton-Pecos County |
| Fort Sumner Municipal (FSU) | Fort Sumner | NM | Olney Municipal to Fort Sumner Municipal |
| Fulton County/Brown Field (FTY) | Atlanta | GA | Olney Municipal to Fulton County/Brown Field |
| Fullerton Municipal (FUL) | Fullerton | CA | Olney Municipal to Fullerton Municipal |
| Fort Wayne International (FWA) | Fort Wayne | IN | Olney Municipal to Fort Wayne International |
| Branson West Municipal - Emerson Field (FWB) | Branson West | MO | Olney Municipal to Branson West Municipal - Emerson Field |
| Manning Municipal (FX4) | Manning | AB | Olney Municipal to Manning Municipal |
| Fort Lauderdale Executive (FXE) | Fort Lauderdale | FL | Olney Municipal to Fort Lauderdale Executive |
| Forest City Municipal (FXY) | Forest City | IA | Olney Municipal to Forest City Municipal |
| Fayetteville Municipal (FYM) | Fayetteville | TN | Olney Municipal to Fayetteville Municipal |
| Drake Field (FYV) | Fayetteville | AR | Olney Municipal to Drake Field |
| Northeast Alabama Regional (GAD) | Gadsden | AL | Olney Municipal to Northeast Alabama Regional |
| Gage (GAG) | Gage | OK | Olney Municipal to Gage |
| Montgomery County Airpark (GAI) | Gaithersburg | MD | Olney Municipal to Montgomery County Airpark |
| Great Bend Municipal (GBD) | Great Bend | KS | Olney Municipal to Great Bend Municipal |
| Galesburg Municipal (GBG) | Galesburg | IL | Olney Municipal to Galesburg Municipal |
| Gillette-Campbell County (GCC) | Gillette | WY | Olney Municipal to Gillette-Campbell County |
| Grand Coulee Dam (GCD) | Electric City | WA | Olney Municipal to Grand Coulee Dam |
| Garden City Regional (GCK) | Garden City | KS | Olney Municipal to Garden City Regional |
| Grand Cayman/Owen Roberts Intl (GCM) | Grand Cayman | | Olney Municipal to Grand Cayman/Owen Roberts Intl |
| Grand Canyon National Park (GCN) | Grand Canyon | AZ | Olney Municipal to Grand Canyon National Park |
| Greeneville-Greene County Municipal (GCY) | Greeneville | TN | Olney Municipal to Greeneville-Greene County Municipal |
| Donaldson Field (GDC) | Greenville | SC | Olney Municipal to Donaldson Field |
| Guadalajara/Don Miguel Hidalgo y Costilla (GDL) | Guadalajara | Jal | Olney Municipal to Guadalajara/Don Miguel Hidalgo y Costilla |
| Grand Turk (Jags Mccartney) Intl (GDT) | Grand Turk I | | Olney Municipal to Grand Turk (Jags Mccartney) Intl |
| Dawson Community (GDV) | Glendive | MT | Olney Municipal to Dawson Community |
| Gladwin Zettel Memorial (GDW) | Gladwin | MI | Olney Municipal to Gladwin Zettel Memorial |
| Delaware Coastal (GED) | Georgetown | DE | Olney Municipal to Delaware Coastal |
| Spokane International (GEG) | Spokane | WA | Olney Municipal to Spokane International |
| South Big Horn County (GEY) | Greybull | WY | Olney Municipal to South Big Horn County |
| Grand Forks International (GFK) | Grand Forks | ND | Olney Municipal to Grand Forks International |
| Floyd Bennett Memorial (GFL) | Glens Falls | NY | Olney Municipal to Floyd Bennett Memorial |
| Georgetown County (GGE) | Georgetown | SC | Olney Municipal to Georgetown County |
| East Texas Regional (GGG) | Longview | TX | Olney Municipal to East Texas Regional |
| Exuma International (GGT) | Exuma Islands | | Olney Municipal to Exuma International |
| Wokal Field/Glasgow International (GGW) | Glasgow | MT | Olney Municipal to Wokal Field/Glasgow International |
| Eleuthera Island/Governors Harbour Intl (GHB) | Eleuthera Island | | Olney Municipal to Eleuthera Island/Governors Harbour Intl |
| Great Harbour Cay (GHC) | Berry Islands | | Olney Municipal to Great Harbour Cay |
| Centerville Municipal (GHM) | Centerville | TN | Olney Municipal to Centerville Municipal |
| Winter Haven Regional (GIF) | Winter Haven | FL | Olney Municipal to Winter Haven Regional |
| Grand Junction Regional Walker Field (GJT) | Grand Junction | CO | Olney Municipal to Grand Junction Regional Walker Field |
| Gatlinburg-Pigeon Forge (GKT) | Sevierville | TN | Olney Municipal to Gatlinburg-Pigeon Forge |
| San Carlos Apache (GLB) | Globe | AZ | Olney Municipal to San Carlos Apache |
| Renner Field/Goodland Municipal (GLD) | Goodland | KS | Olney Municipal to Renner Field/Goodland Municipal |
| Greenville Mid-Delta (GLH) | Greenville | MS | Olney Municipal to Greenville Mid-Delta |
| Gaylord Regional (GLR) | Gaylord | MI | Olney Municipal to Gaylord Regional |
| Scholes International at Galveston (GLS) | Galveston | TX | Olney Municipal to Scholes International at Galveston |
| Glasgow Municipal (GLW) | Glasgow | KY | Olney Municipal to Glasgow Municipal |
| Greenville Downtown (GMU) | Greenville | SC | Olney Municipal to Greenville Downtown |
| Gansner Field (GNF) | Quincy | CA | Olney Municipal to Gansner Field |
| Gooding Municipal (GNG) | Gooding | ID | Olney Municipal to Gooding Municipal |
| Grants-Milan Municipal (GNT) | Grants | NM | Olney Municipal to Grants-Milan Municipal |
| Gainesville Regional (GNV) | Gainesville | FL | Olney Municipal to Gainesville Regional |
| Guthrie-Edmond Regional (GOK) | Guthrie | OK | Olney Municipal to Guthrie-Edmond Regional |
| Groton New London (GON) | Groton New London | CT | Olney Municipal to Groton New London |
| Gulfport-Biloxi International (GPT) | Gulfport | MS | Olney Municipal to Gulfport-Biloxi International |
| Grand Rapids/Itasca County-Gordon Newstrom Field (GPZ) | Grand Rapids | MN | Olney Municipal to Grand Rapids/Itasca County-Gordon Newstrom Field |
| Galion Municipal (GQQ) | Galion | OH | Olney Municipal to Galion Municipal |
| Austin Straubel International (GRB) | Green Bay | WI | Olney Municipal to Austin Straubel International |
| Greenwood County (GRD) | Greenwood | SC | Olney Municipal to Greenwood County |
| Greenville (GRE) | Greenville | IL | Olney Municipal to Greenville |
| Central Nebraska Regional (GRI) | Grand Island | NE | Olney Municipal to Central Nebraska Regional |
| Killeen/Fort Hood Regional/Robert Gray AAF (GRK) | Killeen | TX | Olney Municipal to Killeen/Fort Hood Regional/Robert Gray AAF |
| Grand Marais/Cook County (GRM) | Grand Marais | MN | Olney Municipal to Grand Marais/Cook County |
| Gordon Municipal (GRN) | Gordon | NE | Olney Municipal to Gordon Municipal |
| Gerald R Ford International (GRR) | Grand Rapids | MI | Olney Municipal to Gerald R Ford International |
| Goshen Municipal (GSH) | Goshen | IN | Olney Municipal to Goshen Municipal |
| Piedmont Triad International (GSO) | Greensboro | NC | Olney Municipal to Piedmont Triad International |
| Greenville Spartanburg International (GSP) | Greer | SC | Olney Municipal to Greenville Spartanburg International |
| Great Falls International (GTF) | Great Falls | MT | Olney Municipal to Great Falls International |
| Grants Pass (GTP) | Grants Pass | OR | Olney Municipal to Grants Pass |
| Golden Triangle Regional (GTR) | Columbus | MS | Olney Municipal to Golden Triangle Regional |
| Gunnison/Crested Butte Regional (GUC) | Gunnison | CO | Olney Municipal to Gunnison/Crested Butte Regional |
| Jack Edwards National (GUF) | Gulf Shores | AL | Olney Municipal to Jack Edwards National |
| Gallup Municipal (GUP) | Gallup | NM | Olney Municipal to Gallup Municipal |
| Grissom Aeroplex/Arb (GUS) | Peru | IN | Olney Municipal to Grissom Aeroplex/Arb |
| Guymon Municipal (GUY) | Guymon | OK | Olney Municipal to Guymon Municipal |
| Lee Gilmer Memorial (GVL) | Gainesville | GA | Olney Municipal to Lee Gilmer Memorial |
| Majors (GVT) | Greenville | TX | Olney Municipal to Majors |
| Greenwood Leflore (GWO) | Greenwood | MS | Olney Municipal to Greenwood Leflore |
| Glenwood Springs Municipal (GWS) | Glenwood Springs | CO | Olney Municipal to Glenwood Springs Municipal |
| Greeley-Weld County (GXY) | Greeley | CO | Olney Municipal to Greeley-Weld County |
| Guaymas/Gen Jose Maria Yanez International (GYM) | Guaymas | Son | Olney Municipal to Guaymas/Gen Jose Maria Yanez International |
| Phoenix Goodyear (GYR) | Goodyear | AZ | Olney Municipal to Phoenix Goodyear |
| Gary/Chicago International (GYY) | GARY | IN | Olney Municipal to Gary/Chicago International |
| Marion County-Rankin Fite (HAB) | Hamilton | AL | Olney Municipal to Marion County-Rankin Fite |
| Half Moon Bay (HAF) | Half Moon Bay | CA | Olney Municipal to Half Moon Bay |
| Three Rivers Municipal Dr Haines (HAI) | Three Rivers | MI | Olney Municipal to Three Rivers Municipal Dr Haines |
| Butler County Regional-Hogan Field (HAO) | Hamilton | OH | Olney Municipal to Butler County Regional-Hogan Field |
| Capital City Harrisburg (HAR) | Harrisburg | PA | Olney Municipal to Capital City Harrisburg |
| Hattiesburg Bobby L Chain Municipal (HBG) | Hattiesburg | MS | Olney Municipal to Hattiesburg Bobby L Chain Municipal |
| Holbrook Municipal (HBK) | Holbrook | AZ | Olney Municipal to Holbrook Municipal |
| Hobart Regional (HBR) | Hobart | OK | Olney Municipal to Hobart Regional |
| Big Spring Mc Mahon-Wrinkle (HCA) | Big Spring | TX | Olney Municipal to Big Spring Mc Mahon-Wrinkle |
| Columbia County (HCC) | Hudson | NY | Olney Municipal to Columbia County |
| Cheraw Municipal/Lynch Bellinger Field (HCW) | Cheraw | SC | Olney Municipal to Cheraw Municipal/Lynch Bellinger Field |
| Brewster Field (HDE) | Holdrege | NE | Olney Municipal to Brewster Field |
| Hayden Yampa Valley Regional (HDN) | Hayden | CO | Olney Municipal to Hayden Yampa Valley Regional |
| Thompson-Robbins (HEE) | Helena/West Helena | AR | Olney Municipal to Thompson-Robbins |
| Manassas Regional/Harry P Davis Field (HEF) | Manassas | VA | Olney Municipal to Manassas Regional/Harry P Davis Field |
| Hermiston Municipal (HES) | Hermiston | OR | Olney Municipal to Hermiston Municipal |
| Natchez-Adams County (Hardy-Anders Field) (HEZ) | Natchez | MS | Olney Municipal to Natchez-Adams County (Hardy-Anders Field) |
| Hartford/Brainard (HFD) | Hartford | CT | Olney Municipal to Hartford/Brainard |
| Richard A Henson Field/Hagerstown Regional (HGR) | Hagerstown | MD | Olney Municipal to Richard A Henson Field/Hagerstown Regional |
| Hilton Head (HHH) | Hilton Head Island | SC | Olney Municipal to Hilton Head |
| Hawthorne Municipal/Jack Northrop Field (HHR) | Hawthorne | CA | Olney Municipal to Hawthorne Municipal/Jack Northrop Field |
| Range Regional (HIB) | Hibbing | MN | Olney Municipal to Range Regional |
| Mount Washington Regional (HIE) | Whitefield | NH | Olney Municipal to Mount Washington Regional |
| Lake Havasu City (HII) | Lake Havasu City | AZ | Olney Municipal to Lake Havasu City |
| Portland/Hillsboro (HIO) | Portland | OR | Olney Municipal to Portland/Hillsboro |
| Blytheville Municipal (HKA) | Blytheville | AR | Olney Municipal to Blytheville Municipal |
| Hawkins Field (HKS) | Jackson | MS | Olney Municipal to Hawkins Field |
| Hickory Regional (HKY) | Hickory | NC | Olney Municipal to Hickory Regional |
| Hill City Municipal (HLC) | Hill City | KS | Olney Municipal to Hill City Municipal |
| Wheeling Ohio County (HLG) | Wheeling | WV | Olney Municipal to Wheeling Ohio County |
| Hollister Municipal (HLI) | Hollister | CA | Olney Municipal to Hollister Municipal |
| Helena Regional (HLN) | Helena | MT | Olney Municipal to Helena Regional |
| Hermosillo/Gen Ignacio P Garcia (HMO) | Hermosillo | Son | Olney Municipal to Hermosillo/Gen Ignacio P Garcia |
| Hemet-Ryan (HMT) | Hemet | CA | Olney Municipal to Hemet-Ryan |
| Huntingburg (HNB) | Huntingburg | IN | Olney Municipal to Huntingburg |
| Hobbs/Lea County Regional (HOB) | Hobbs | NM | Olney Municipal to Hobbs/Lea County Regional |
| Huron Regional (HON) | Huron | SD | Olney Municipal to Huron Regional |
| Memorial Field (HOT) | Hot Springs | AR | Olney Municipal to Memorial Field |
| William P Hobby (HOU) | Houston | TX | Olney Municipal to William P Hobby |
| Westchester County (HPN) | White Plains | NY | Olney Municipal to Westchester County |
| Hampton Municipal (HPT) | Hampton | IA | Olney Municipal to Hampton Municipal |
| Baytown (HPY) | Houston | TX | Olney Municipal to Baytown |
| Bowerman (HQM) | Hoquiam | WA | Olney Municipal to Bowerman |
| Valley International (HRL) | Harlingen | TX | Olney Municipal to Valley International |
| Boone County Regional (HRO) | Harrison | AR | Olney Municipal to Boone County Regional |
| Harrisburg-Raleigh (HSB) | Harrisburg | IL | Olney Municipal to Harrisburg-Raleigh |
| Henderson Executive (HSH) | Las Vegas | NV | Olney Municipal to Henderson Executive |
| Hastings Municipal (HSI) | Hastings | NE | Olney Municipal to Hastings Municipal |
| Ingalls Field (HSP) | Hot Springs | VA | Olney Municipal to Ingalls Field |
| Huntsville International/Carl T Jones Field (HSV) | Huntsville | AL | Olney Municipal to Huntsville International/Carl T Jones Field |
| Hawthorne Industrial (HTH) | Hawthorne | NV | Olney Municipal to Hawthorne Industrial |
| Roscommon County - Blodgett Memorial (HTL) | Houghton Lake | MI | Olney Municipal to Roscommon County - Blodgett Memorial |
| East Hampton (JPX) | East Hampton | NY | Olney Municipal to East Hampton |
| Tri-State Milton J Ferguson Field (HTS) | Huntington | WV | Olney Municipal to Tri-State Milton J Ferguson Field |
| Huntsville Municipal (HTV) | Huntsville | TX | Olney Municipal to Huntsville Municipal |
| Humboldt Municipal (HUD) | Humboldt | IA | Olney Municipal to Humboldt Municipal |
| Terre Haute Regional (HUF) | Terre Haute | IN | Olney Municipal to Terre Haute Regional |
| Stan Stamper Municipal (HUJ) | Hugo | OK | Olney Municipal to Stan Stamper Municipal |
| Houlton International (HUL) | Houlton | ME | Olney Municipal to Houlton International |
| Houma-Terrebonne (HUM) | Houma | LA | Olney Municipal to Houma-Terrebonne |
| Hutchinson Regional (HUT) | Hutchinson | KS | Olney Municipal to Hutchinson Regional |
| Bahias De Huatulco (HUX) | Bahias del Huatulco | Oax | Olney Municipal to Bahias De Huatulco |
| Hanksville (HVE) | Hanksville | UT | Olney Municipal to Hanksville |
| Tweed/New Haven (HVN) | New Haven | CT | Olney Municipal to Tweed/New Haven |
| Havre City-County (HVR) | Havre | MT | Olney Municipal to Havre City-County |
| Hartsville Regional (HVS) | Hartsville | SC | Olney Municipal to Hartsville Regional |
| Hayward Executive (HWD) | Hayward | CA | Olney Municipal to Hayward Executive |
| Barnstable Municipal/Boardman-Polando Field (HYA) | Hyannis | MA | Olney Municipal to Barnstable Municipal/Boardman-Polando Field |
| San Marcos Regional (HYI) | San Marcos | TX | Olney Municipal to San Marcos Regional |
| Sawyer County (HYR) | Hayward | WI | Olney Municipal to Sawyer County |
| Hays Regional (HYS) | Hays | KS | Olney Municipal to Hays Regional |
| Hazleton Regional (HZL) | Hazleton | PA | Olney Municipal to Hazleton Regional |
| Washington Dulles International (IAD) | Washington | VA | Olney Municipal to Washington Dulles International |
| Niagara Falls International (IAG) | Niagara Falls | NY | Olney Municipal to Niagara Falls International |
| George Bush Intercontinental Houston (IAH) | Houston | TX | Olney Municipal to George Bush Intercontinental Houston |
| Schenck Field (ICL) | Clarinda | IA | Olney Municipal to Schenck Field |
| Cascade (ICS) | Cascade | ID | Olney Municipal to Cascade |
| Wichita Eisenhower National (ICT) | Wichita | KS | Olney Municipal to Wichita Eisenhower National |
| Idaho Falls Regional (IDA) | Idaho Falls | ID | Olney Municipal to Idaho Falls Regional |
| Ida Grove Municipal (IDG) | Ida Grove | IA | Olney Municipal to Ida Grove Municipal |
| Indiana County/Jimmy Stewart Field (IDI) | Indiana | PA | Olney Municipal to Indiana County/Jimmy Stewart Field |
| Independence Municipal (IDP) | Independence | KS | Olney Municipal to Independence Municipal |
| Iowa Falls Municipal (IFA) | Iowa Falls | IA | Olney Municipal to Iowa Falls Municipal |
| Laughlin/Bullhead International (IFP) | Bullhead City | AZ | Olney Municipal to Laughlin/Bullhead International |
| Great Inagua Island/Matthew Town (IGA) | Great Inagua Island | | Olney Municipal to Great Inagua Island/Matthew Town |
| Kingman (IGM) | Kingman | AZ | Olney Municipal to Kingman |
| Jacksonville Municipal (IJX) | Jacksonville | IL | Olney Municipal to Jacksonville Municipal |
| Wilkes County (IKB) | N Wilkesboro | NC | Olney Municipal to Wilkes County |
| Greater Kankakee (IKK) | Kankakee | IL | Olney Municipal to Greater Kankakee |
| Skylark Field Killeen (ILE) | Killeen | TX | Olney Municipal to Skylark Field Killeen |
| Wilmington/New Castle (ILG) | Wilmington | DE | Olney Municipal to Wilmington/New Castle |
| Willmar Municipal/John L Rice Field (ILL) | Willmar | MN | Olney Municipal to Willmar Municipal/John L Rice Field |
| Wilmington International (ILM) | Wilmington | NC | Olney Municipal to Wilmington International |
| Wilmington Airpark (ILN) | Wilmington | OH | Olney Municipal to Wilmington Airpark |
| Imperial Municipal (IML |
