| IATA |
ICAO |
Airport name |
Location served |
| -OA- |
| OAJ |
KOAJ |
Albert J. Ellis Airport |
Jacksonville, North Carolina, United States |
| OAK |
KOAK |
Oakland International Airport |
Oakland (near San Francisco), California, United States |
| OAM |
NZOU |
Oamaru Airport |
Oamaru, North Otago, New Zealand |
| OAX |
MMOX |
Xoxocotlán International Airport |
Oaxaca, Mexico |
| -OB- |
| OBC |
HDOB |
Obock Airport |
Obock, Djibouti |
| OBD |
LEBA |
Córdoba Airport |
Córdoba, Spain |
| OBE |
KOBE |
Okeechobee County Airport |
Okeechobee, Florida, United States |
| OBF |
EDMO |
Oberpfaffenhofen Airport |
Oberpfaffenhofen, Germany |
| OBL |
EBZR |
Zoersel-Oostmalle Airfield |
Zoersel / Oostmalle, Belgium |
| OBO |
RJCB |
Tokachi-Obihiro Airport |
Obihiro, Tokachi Subprefecture, Hokkaido, Japan |
| OBU |
|
Kobuk Airport |
Kobuk, Alaska, United States |
| OBY |
BGSC |
Ittoqqortoormiit Heliport |
Ittoqqortoormiit, Greenland |
| -OC- |
| OCA |
|
Ocean Reef Club Airport (FAA: 07FA) |
Key Largo, Florida, United States |
| OCC |
SECO |
Francisco de Orellana Airport |
Coca, Ecuador |
| OCE |
KOXB |
Ocean City Municipal Airport (FAA: OXB) |
Ocean City, Maryland, United States |
| OCF |
KOCF |
Ocala International Airport (Jim Taylor Field) |
Ocala, Florida, United States |
| OCH |
KOCH |
A. L. Mangham Jr. Regional Airport |
Nacogdoches, Texas, United States |
| OCJ |
MKBS |
Boscobel Aerodrome |
Ocho Rios, Jamaica |
| OCN |
KOKB |
Oceanside Municipal Airport (FAA: OKB) |
Oceanside, California, United States |
| OCW |
KOCW |
Warren Field |
Washington, North Carolina, United States |
| -OD- |
| ODB |
LEBA |
Córdoba Airport |
Córdoba, Spain |
| ODE |
EKOD |
Odense Airport |
Odense, Denmark |
| ODH |
EGVO |
RAF Odiham |
Odiham, United Kingdom |
| ODS |
UKOO |
Odessa International Airport |
Odessa, Ukraine |
| ODW |
KOKH |
A.J. Eisenberg Airport (FAA: OKH) |
Oak Harbor, Washington, United States |
| -OE- |
| OEA |
KOEA |
O'Neal Airport |
Vincennes, Indiana, United States |
| OEC |
|
Ocussi Airport |
Ocussi, Indonesia |
| OEL |
|
Oryol Yuzhny Airport |
Oryol, Russia |
| OEM |
SMPA |
Vincent Fayks Airport |
Paloemeu, Suriname |
| OEO |
KOEO |
L. O. Simenstad Municipal Airport |
Osceola, Wisconsin, United States |
| OER |
ESNO |
Örnsköldsvik Airport |
Örnsköldsvik, Sweden |
| OES |
|
San Antonio Oeste Airport |
San Antonio Oeste, Argentina |
| -OF- |
| OFF |
KOFF |
Offutt Air Force Base |
Omaha, Nebraska, United States |
| OFK |
KOFK |
Karl Stefan Memorial Airport |
Norfolk, Nebraska, United States |
| OFU |
|
Ofu Airport |
Ofu, American Samoa |
| -OG- |
| OGA |
KOGA |
Searle Field |
Ogallala, Nebraska, United States |
| OGB |
KOGB |
Orangeburg Municipal Airport |
Orangeburg, South Carolina, United States |
| OGD |
KOGD |
Ogden-Hinckley Airport |
Ogden, Utah, United States |
| OGG |
PHOG |
Kahului Airport |
Kahului, Hawaii, United States |
| OGL |
SYGO |
Ogle Airport |
Georgetown, Guyana |
| OGR |
FTTB |
Bongor Airport |
Bongor, Chad |
| OGS |
KOGS |
Ogdensburg International Airport |
Ogdensburg, New York, United States |
| OGZ |
URMO |
Beslan Airport |
Beslan / Vladikavkaz, North Ossetia–Alania, Russia |
| -OH- |
| OHD |
LWOH |
Ohrid Airport |
Ohrid, Republic of Macedonia |
| OHE |
ZYMH |
Mohe Gulian Airport |
Mohe, Heilongjiang, China |
| OHH |
UHSH |
Okha Airport |
Okha, Russia |
| OHO |
|
Okhotsk Airport |
Okhotsk, Khabarovsk Krai, Russia |
| OHT |
OPKT |
Kohat Airport |
Kohat, Pakistan |
| -OI- |
| OIC |
KOIC |
Norwich Lt. Warren Eaton Airport |
Norwich, New York, United States |
| OIR |
RJEO |
Okushiri Airport |
Okushiri, Okushiri Island, Hokkaido, Japan |
| OIT |
RJFO |
Oita Airport |
Oita, Japan |
| OIZ |
DTTP |
Bizerte-Sidi Ahmed Air Base |
Bizerte, Tunisia |
| -OJ- |
| OJC |
KOJC |
Johnson County Executive Airport |
Olathe, Kansas, United States |
| -OK- |
| OKA |
ROAH |
Naha Airport |
Okinawa, Japan |
| OKB |
|
Orchid Beach |
Fraser Island, Queensland, Australia |
| OKC |
KOKC |
Will Rogers World Airport |
Oklahoma City, Oklahoma, United States |
| OKH |
EGXJ |
RAF Cottesmor |
Oakham, England, United Kingdom |
| OKJ |
RJOB |
Okayama Airport |
Okayama, Japan |
| OKK |
KOKK |
Kokomo Municipal Airport |
Kokomo, Indiana, United States |
| OKM |
KOKM |
Okmulgee Regional Airport |
Okmulgee, Oklahoma, United States |
| OKS |
KOKS |
Garden County Airport |
Oshkosh, Nebraska, United States |
| OKT |
UWUK |
Oktyabrsky Airport |
Oktyabrsky, Bashkortostan, Russia |
| -OL- |
| OLB |
LIEO |
Olbia – Costa Smeralda Airport |
Olbia, Italy |
| OLD |
KOLD |
Old Town Municipal Airport and Seaplane Base (DeWitt Field) |
Old Town, Maine, United States |
| OLE |
KOLE |
Cattaraugus County-Olean Airport |
Olean, New York, United States |
| OLF |
KOLF |
L. M. Clayton Airport |
Wolf Point, Montana, United States |
| OLH |
|
Old Harbor Airport (FAA: 6R7) |
Old Harbor, Alaska, United States |
| OLM |
KOLM |
Olympia Airport |
Olympia, Washington, United States |
| OLS |
KOLS |
Nogales International Airport |
Nogales, Arizona, United States |
| OLU |
KOLU |
Columbus Municipal Airport (Nebraska) |
Columbus, Nebraska, United States |
| OLV |
KOLV |
Olive Branch Airport |
Olive Branch, Mississippi, United States |
| OLY |
KOLY |
Olney-Noble Airport |
Olney-Noble, Illinois, United States |
| -OM- |
| OMA |
KOMA |
Eppley Airfield |
Omaha, Nebraska, United States |
| OMC |
RPVO |
Ormoc Airport |
Ormoc City, Philippines |
| OME |
PAOM |
Nome Airport |
Nome, Alaska, United States |
| OMH |
OITR |
Orange County Airport |
Orange, Virginia, United States |
| OMI |
OIAJ |
Omidiyeh Air Base |
Omidiyeh, Iran |
| OMK |
KOMK |
Omak Airport |
Omak, Washington, United States |
| OMN |
|
Osmanabad Airport |
Osmanabad, India |
| OMO |
LQMO |
Mostar International Airport |
Mostar, Bosnia and Herzegovina |
| OMR |
LROD |
Oradea International Airport |
Oradea, Romania |
| OMS |
UNOO |
Omsk Airport |
Omsk, Russia |
| -ON- |
| ONA |
KONA |
Winona Municipal Airport (Max Conrad Field) |
Winona, Minnesota, United States |
| ONH |
|
Oneonta Municipal Airport (FAA: N66) |
Oneonta, New York, United States |
| ONJ |
RJSR |
Odate-Noshiro Airport |
Kitaakita, Akita, Japan |
| ONL |
KONL |
O'Neill Municipal Airport (John L. Baker Field) |
O'Neill, Nebraska, United States |
| ONM |
KONM |
Socorro Municipal Airport |
Socorro, New Mexico, United States |
| ONN |
|
Onion Bay Airport |
Onion Bay, Alaska, United States |
| ONO |
KONO |
Ontario Municipal Airport |
Ontario, Oregon, United States |
| ONP |
KONP |
Newport Municipal Airport |
Newport, Oregon, United States |
| ONQ |
LTAS |
Zonguldak Airport |
Zonguldak, Turkey |
| ONT |
KONT |
Ontario International Airport |
Ontario (near Los Angeles), California, United States |
| ONX |
MPEJ |
Enrique Adolfo Jiménez Airport |
Colón, Panama |
| ONY |
KONY |
Olney Municipal Airport |
Olney, Texas, United States |
| -OO- |
| OOA |
KOOA |
Oskaloosa Municipal Airport |
Oskaloosa, Iowa, United States |
| OOK |
PAOO |
Toksook Bay Airport |
Toksook Bay, Alaska, United States |
| OOL |
YBCG |
Gold Coast Airport |
Coolangatta, Queensland, Australia |
| -OP- |
| OPF |
KOPF |
Opa-locka Airport |
Miami, Florida, United States |
| OPL |
KOPL |
St. Landry Parish Airport (Ahart Field) |
Opelousas, Louisiana, United States |
| OPO |
LPPR |
Francisco Sá Carneiro Airport |
Porto, Portugal |
| OPS |
SWSI |
Aeroporto de Sinop Airport |
Sinop, Mato Grosso, Brazil |
| -OQ- |
| OQN |
KOQN |
Brandywine Airport |
West Chester, Pennsylvania, United States |
| -OR- |
| ORB |
ESOE |
Örebro Airport |
Örebro, Sweden |
| ORC |
KORC |
Orange City Municipal Airport |
Orange City, Iowa, United States |
| ORD |
KORD |
O'Hare International Airport (formerly Orchard Depot Field) |
Chicago, Illinois, United States |
| ORE |
LFOJ |
Orléans - Bricy Air Base |
Orléans, France |
| ORF |
KORF |
Norfolk International Airport |
Norfolk, Virginia (near Virginia Beach and Williamsburg), United States |
| ORG |
SMZO |
Zorg en Hoop Airport |
Paramaribo, Suriname |
| ORH |
KORH |
Worcester Regional Airport |
Worcester, Massachusetts, United States |
| ORI |
KORI |
Port Lions Airport |
Port Lions, Alaska, United States |
| ORJ |
SYDR |
Orinduik Airport |
Orinduik, Guyana |
| ORK |
EICK |
Cork Airport |
Cork, Ireland |
| ORL |
KORL |
Orlando Executive Airport |
Orlando, Florida, United States |
| ORM |
EGBK |
Sywell Aerodrome |
Northampton / Peterborough, United Kingdom |
| ORN |
DAOO |
Oran Es Sénia Airport |
Oran, Algeria |
| ORR |
|
Yorketown Airport |
Yorketown, South Australia, Australia |
| ORS |
|
Waterport Airport |
Orpheus, Queensland, Australia |
| ORT |
PAOR |
Northway Airport |
Northway, Alaska, United States |
| ORU |
|
Oruro Airport |
Oruro, Bolivia |
| ORV |
PFNO |
Robert (Bob) Curtis Memorial Airport (FAA: D76) |
Noorvik, Alaska, United States |
| ORY |
LFPO |
Orly International Airport |
Paris-Orly, Paris, France |
| -OS- |
| OSA |
|
All Airports (was used for Osaka International Airport) |
Osaka, Japan |
| OSB |
|
Grand Glaize-Osage Beach Airport (FAA: K15) |
Osage Beach, Missouri, United States |
| OSC |
KOSC |
Oscoda-Wurtsmith Airport |
Oscoda, Michigan, United States |
| OSD |
ESNZ |
Åre Östersund Airport |
Östersund, Sweden |
| OSH |
KOSH |
Wittman Regional Airport |
Oshkosh, Wisconsin, United States |
| OSI |
LDOS |
Osijek Airport |
Osijek, Croatia |
| OSL |
ENGM |
Oslo Airport, Gardermoen (succeeding Oslo Airport, Fornebu) |
Ullensaker (near Oslo), Norway |
| OSR |
LKMT |
Ostrava-Mosnov International Airport |
Ostrava, Czech Republic |
| OSS |
UAFO |
Osh Airport |
Osh, Kyrgyzstan |
| OST |
EBOS |
Ostend-Bruges International Airport |
Flanders, Belgium |
| OSU |
KOSU |
Ohio State University Airport |
Columbus, Ohio, United States |
| OSX |
KOSX |
Kosciusko-Attala County Airport |
Kosciusko, Mississippi, United States |
| OSW |
UWOR |
Orsk Airport |
Orsk, Orenburg Oblast, Russia |
| OSY |
ENNM |
Namsos Airport, Høknesøra |
Namsos, Norway |
| -OT- |
| OTC |
FTTL |
Bol Airport |
Bol, Chad |
| OTG |
KOTG |
Worthington Municipal Airport |
Worthington, Minnesota, United States |
| OTH |
KOTH |
North Bend Municipal Airport |
North Bend, Oregon, United States |
| OTL |
GQNB |
Boutilimit Airport |
Boutilimit, Mauritania |
| OTM |
KOTM |
Ottumwa Industrial Airport |
Ottumwa, Iowa, United States |
| OTN |
|
Ed-Air Airport (FAA: 2IG4) |
Oaktown, Indiana, United States |
| OTP |
LROP |
Henri Coanda International Airport |
Otopeni (near Bucharest), Romania |
| OTR |
MRCC |
Coto 47 Airport |
Coto 47, Costa Rica |
| OTS |
|
Anacortes Airport (FAA: 74S) |
Anacortes, Washington, United States |
| OTZ |
PAOT |
Ralph Wien Memorial Airport |
Kotzebue, Alaska, United States |
| -OU- |
| OUA |
DFFD |
Ouagadougou Airport |
Ouagadougou, Burkina Faso |
| OUD |
GMFO |
Angads Airport |
Oujda, Morocco |
| OUG |
DFCC |
Ouahigouya Airport |
Ouahigouya, Burkina Faso |
| OUL |
EFOU |
Oulu Airport |
Oulu, Finland |
| OUM |
|
Oum Hadjer Airport |
Oum Hadjer, Chad |
| OUN |
KOUN |
University of Oklahoma Westheimer Airport |
Norman, Oklahoma, United States |
| OUR |
FKKI |
Batouri Airport |
Batouri, Cameroon |
| OUT |
FTTS |
Bousso Airport |
Bousso, Chad |
| OUZ |
GQPZ |
Tazadit Airport |
Zouerate, Mauritania |
| -OV- |
| OVB |
UNNT |
Novosibirsk Tolmachevo Airport |
Novosibirsk, Russia |
| OVD |
LEAS |
Asturias Airport (Oviedo Airport) |
Oviedo, Asturias, Spain |
| OVE |
KOVE |
Oroville Municipal Airport |
Oroville, California, United States |
| OVL |
KOVL |
Olivia Regional Airport |
Olivia, Minnesota, United States |
| OVS |
USHS |
Sovetsky Airport |
Sovetsky, Khanty–Mansi Autonomous Okrug, Russia |
| -OW- |
| OWA |
KOWA |
Owatonna Degner Regional Airport |
Owatonna, Minnesota, United States |
| OWB |
KOWB |
Owensboro-Daviess County Airport |
Owensboro, Kentucky, United States |
| OWD |
KOWD |
Norwood Memorial Airport |
Norwood, Massachusetts, United States |
| OWK |
KOWK |
Central Maine Airport of Norridgewock |
Norridgewock, Maine, United States |
| -OX- |
| OXB |
GGOV |
Osvaldo Vieiro International Airport |
Bissau, Guinea-Bissau |
| OXC |
KOXC |
Waterbury-Oxford Airport |
Oxford, Connecticut, United States |
| OXD |
KOXD |
Miami University Airport |
Oxford, Ohio, United States |
| OXF |
EGKT |
London Oxford Airport |
Oxford, England, United Kingdom |
| OXR |
KOXR |
Oxnard Airport |
Oxnard, California, United States |
| -OY- |
| OYK |
SBOI |
Oiapoque Airport |
Oiapoque, Amapa , Brazil |
| -OZ- |
| OZA |
KOZA |
Ozona Municipal Airport |
Ozona, Texas, United States |
| OZC |
RPMO |
Labo Airport |
Ozamiz City, Misamis Occidental, Philippines |
| OZR |
KOZR |
Cairns Army Airfield (Fort Rucker) |
Fort Rucker/Ozark, Alabama, United States |
| OZZ |
GMMZ |
Ouarzazate Airport |
Ouarzazate, Morocco |
