- O K Flying Club Inc AirportIdent: 28ISCountry: United States
- O S Wyatt AirportIdent: 14TSCountry: United States
- O'Brien Airpark East/West AirportIdent: FD71Country: United States
- O'Brien Flying Service AirportIdent: LA71Country: United States
- O'Connor FieldIdent: 8IL5Country: United States
- O'Neal AirportIdent: KOEACountry: United States
- O'Neill Municipal Airport–John L Baker FieldIdent: KONLCountry: United States
- O'Toole Ranch AirportIdent: NV02Country: United States
- O.R. Tambo International AirportIdent: FAORCountry: South Africa
- OAG Unmanned Center AirportIdent: US-12643Country: United States
- Oak Country Ranch AirportIdent: 33CLCountry: United States
- Oak Glen Ranch AirportIdent: 3TS9Country: United States
- Oak Grove Marine Corps Outlying FieldIdent: 13NCCountry: United States
- Oak Hammock Air ParkIdent: CAV9Country: Canada
- Oak Lake Air StripIdent: MN42Country: United States
- Oak Ridge AirparkIdent: MO80Country: United States
- Oak Ridge AirportIdent: FL82Country: United States
- Oak Ridge AirportIdent: NY16Country: United States
- Oak Ridge Farms AirportIdent: 5MO9Country: United States
- Oak Ridge Plantation AirportIdent: 13GACountry: United States
- Oak Tree LandingIdent: 6J8Country: United States
- Oak Valley AirportIdent: YOKVCountry: Australia
- Oakbrook AirportIdent: 47WICountry: United States
- Oakdale AirportIdent: KO27Country: United States
- Oakes FieldIdent: 66INCountry: United States
- Oakes Municipal AirportIdent: K2D5Country: United States
- Oakesdale AirportIdent: 75DCCountry: United States
- Oakey Army Aviation CentreIdent: YBOKCountry: Australia
- Oakhill AirparkIdent: SC82Country: United States
- Oakland County International AirportIdent: KPTKCountry: United States
- Oakland San Francisco Bay AirportIdent: KOAKCountry: United States
- Oakland Southwest AirportIdent: KY47Country: United States
- Oakland Troy AirportIdent: KVLLCountry: United States
- Oakleaf AirportIdent: 9SD8Country: United States
- Oakley AirportIdent: TN79Country: United States
- Oakley Municipal AirportIdent: 1U6Country: United States
- Oakley Municipal AirportIdent: KOELCountry: United States
- Oakridge Ranch AirportIdent: 26OGCountry: United States
- Oakridge State AirportIdent: K5S0Country: United States
- Oaks AirportIdent: TX24Country: United States
- Oaksey Park AirfieldIdent: EGTWCountry: United Kingdom
- Oakvale AirportIdent: YOKECountry: Australia
- Oakwood FieldIdent: CA-1263Country: Canada
- Oamaru AirportIdent: NZOUCountry: New Zealand
- Oasis Ranger Station - US Government AirportIdent: 9FL7Country: United States
- Oban AirportIdent: EGEOCountry: United Kingdom
- Obando Cesar Gaviria Trujillo AirportIdent: SKPDCountry: Colombia
- Obannon Creek AerodromeIdent: OH66Country: United States
- Obano AirportIdent: ID-OBDCountry: Indonesia
- Oberlander AirportIdent: PA52Country: United States
- Oberlin Municipal AirportIdent: KOINCountry: United States
- Obermehler-Schlotheim AirfieldIdent: EDCOCountry: Germany
- Oberpfaffenhofen AirportIdent: EDMOCountry: Germany
- Oberá AirportIdent: SATOCountry: Argentina
- Obi One AirportIdent: 7OH3Country: United States
- Obo AirportIdent: AYOBCountry: Papua New Guinea
- Obura AirstripIdent: AYODCountry: Papua New Guinea
- Ocala International Airport - Jim Taylor FieldIdent: KOCFCountry: United States
- Ocaña AirfieldIdent: LEOCCountry: Spain
- Ocean City Municipal AirportIdent: KOXBCountry: United States
- Ocean City Municipal AirportIdent: 26NCountry: United States
- Ocean County AirportIdent: KMJXCountry: United States
- Ocean Reef Club AirportIdent: 07FACountry: United States
- Ocean Ridge AirportIdent: E55Country: United States
- Ocean Springs AirportIdent: K5R2Country: United States
- Oceana County AirportIdent: KC04Country: United States
- Oceana Naval Air StationIdent: KNTUCountry: United States
- Oceano County AirportIdent: L52Country: United States
- Oceanside Municipal AirportIdent: KOKBCountry: United States
- Ochoa FieldIdent: 6WA4Country: United States
- Ochs Private AirportIdent: 72ORCountry: United States
- Ockel Farms AirportIdent: DE23Country: United States
- Oconee County Regional AirportIdent: KCEUCountry: United States
- Oconomowoc AirportIdent: 0WI8Country: United States
- Ocorema AirportIdent: SSLRCountry: Brazil
- Ocotillo AirportIdent: L90Country: United States
- Ocracoke Island AirportIdent: KW95Country: United States
- October AirportIdent: HEOCCountry: Egypt
- Odate Noshiro AirportIdent: RJSRCountry: Japan
- Odegaard AirportIdent: 57NDCountry: United States
- Odell Williamson Municipal AirportIdent: K60JCountry: United States
- Odense Hans Christian Andersen AirportIdent: EKODCountry: Denmark
- Odesa International AirportIdent: UKOOCountry: Ukraine
- Odessa / Strawberry Lakes AirstripIdent: CSL7Country: Canada
- Odessa Municipal AirportIdent: K43DCountry: United States
- Odessa Schlemeyer FieldIdent: KODOCountry: United States
- Odom's Flying Service AirportIdent: 50FLCountry: United States
- Odom's Roost AirportIdent: 76OKCountry: United States
- Oecusse Route of the Sandalwood International AirportIdent: WPOCCountry: Timor-Leste
- Oehna AirfieldIdent: EDBOCountry: Germany
- Oeiras AirportIdent: SNOECountry: Brazil
- Oelwein Municipal AirportIdent: KOLZCountry: United States
- Oenpelli AirportIdent: YOENCountry: Australia
- Oerlinghausen AirfieldIdent: EDLOCountry: Germany
- Oesman Sadik AirportIdent: WAPHCountry: Indonesia
- Offenburg-Baden AirfieldIdent: EDTOCountry: Germany
- Offutt Acres AirportIdent: PN02Country: United States
- Offutt Air Force BaseIdent: KOFFCountry: United States
- Oficina Victoria AirportIdent: CL-SC49Country: Chile
- Ofu AirportIdent: NSASCountry: American Samoa
- Ogallala Municipal Airport Searle FieldIdent: KOGACountry: United States
- Ogden Hinckley AirportIdent: KOGDCountry: United States
- Ogdensburg International AirportIdent: KOGSCountry: United States
- Ogeranang AirportIdent: AYOGCountry: Papua New Guinea
- Oghab 44 AirbaseIdent: IR-0161Country: Iran
- Ogilvie River AirportIdent: CFS4Country: Canada
- Ogle County AirportIdent: C55Country: United States
- Oglesby Farms Inc. AirportIdent: MS86Country: United States
- Ogoki Post AirportIdent: CYKPCountry: Canada
- Ohio County AirportIdent: K7K4Country: United States
- Ohio University AirportIdent: KUNICountry: United States
- Ohkay Owingeh AirportIdent: KE14Country: United States
- Ohman Ranch AirportIdent: WY12Country: United States
- Ohrid St. Paul the Apostle AirportIdent: LWOHCountry: North Macedonia
- Oiapoque AirportIdent: SBOICountry: Brazil
- Oita AirportIdent: RJFOCountry: Japan
- Ojibwa AirparkIdent: KD11Country: United States
- Ojika AirportIdent: RJDOCountry: Japan
- Okaba AirportIdent: WAKOCountry: Indonesia
- Okanogan Legion AirportIdent: S35Country: United States
- Okao AirportIdent: AYOFCountry: Papua New Guinea
- Okara Cantonment AirstripIdent: OPOKCountry: Pakistan
- Okayama Momotaro AirportIdent: RJOBCountry: Japan
- Okba Ibn Nafa Air BaseIdent: HL77Country: Libya
- OKC Will Rogers World AirportIdent: KOKCCountry: United States
- Okeechobee County AirportIdent: KOBECountry: United States
- Okeelanta AirportIdent: FL41Country: United States
- Okha AirportIdent: UHSHCountry: Russia
- Okhotsk AirportIdent: UHOOCountry: Russia
- Oki Global Geopark AirportIdent: RJNOCountry: Japan
- Okinoerabu AirportIdent: RJKBCountry: Japan
- Okisai AirstripIdent: AYOHCountry: Papua New Guinea
- Okiwi Station AirportIdent: NZOXCountry: New Zealand
- Okmulgee Regional AirportIdent: KOKMCountry: United States
- Okolona Municipal Airport Richard Stovall FieldIdent: K5A4Country: United States
- Okondja AirportIdent: FOGQCountry: Gabon
- Oksapmin AirportIdent: AYOJCountry: Papua New Guinea
- Oksibil AirportIdent: WAJOCountry: Indonesia
- Oksywie Air Base / Gdynia-Kosakowo AirfieldIdent: EPOKCountry: Poland
- Oktibbeha AirportIdent: KM51Country: United States
- Oktyabrskiy AirportIdent: RU-0468Country: Russia
- Oktyabrskiy AirportIdent: UWUKCountry: Russia
- Oktyabrskoe Air BaseIdent: UA-0010Country: Ukraine
- Okushiri AirportIdent: RJEOCountry: Japan
- Okyap AirstripIdent: ID-0111Country: Indonesia
- Olafson Brothers AirportIdent: 03NDCountry: United States
- Olavarria AirportIdent: SAZFCountry: Argentina
- Olavo Cecco Rigon AirportIdent: SSCKCountry: Brazil
- Olbia Costa Smeralda AirportIdent: LIEOCountry: Italy
- Olcott-Newfane AirportIdent: D80Country: United States
- Old 66 StripIdent: 70OKCountry: United States
- Old AerodromeIdent: 9CL7Country: United States
- Old Andado AirportIdent: YOADCountry: Australia
- Old Boston AirportIdent: US-1110Country: United States
- Old Bridge AirportIdent: K3N6Country: United States
- Old Buckenham AirfieldIdent: EGSVCountry: United Kingdom
- Old Crow AirportIdent: CYOCCountry: Canada
- Old Dairy AirportIdent: 3WN2Country: United States
- Old Forge AirportIdent: NK26Country: United States
- Old Forker UltralightportIdent: TA30Country: United States
- Old Fort Farm AirportIdent: 50NYCountry: United States
- Old Glory FieldIdent: US-8437Country: United States
- Old Hickory AirparkIdent: US-6204Country: United States
- Old Hickory Ranch AirportIdent: 56LACountry: United States
- Old Hoppe Place AirportIdent: 67TXCountry: United States
- Old Khurais AirportIdent: OEKRCountry: Saudi Arabia
- Old Kingsbury AerodromeIdent: 85TECountry: United States
- Old Lilongwe AirportIdent: FWLECountry: Malawi
- Old Nabire AirportIdent: ID-0339Country: Indonesia
- Old Orchard AirparkIdent: 2NK9Country: United States
- Old Orchard AirportIdent: 0PS4Country: United States
- Old Plains AirportIdent: 9PA2Country: United States
- Old Port Royal AirportIdent: 6NY1Country: United States
- Old Reb AirportIdent: 5XS6Country: United States
- Old Rhinebeck AerodromeIdent: NY94Country: United States
- Old Sarum AirfieldIdent: EGLSCountry: United Kingdom
- Old Station AirfieldIdent: AU-0351Country: Australia
- Old Valley AirportIdent: US-0513Country: United States
- Old Warden AirfieldIdent: EGTHCountry: United Kingdom
- Oldenburg-Hatten AirfieldIdent: EDWHCountry: Germany
- Oldfield AeroIdent: 27IACountry: United States
- Oldham County AirportIdent: KE52Country: United States
- Olds (Netook) AirportIdent: CFK6Country: Canada
- Olds-Didsbury AirportIdent: CEA3Country: Canada
- Oldstown Flying Tails AirportIdent: US-0903Country: United States
- Olenya Air BaseIdent: RU-4464Country: Russia
- Olenyok AirportIdent: UEROCountry: Russia
- Oleo AirportIdent: 4II3Country: United States
- Olfert AirportIdent: MT04Country: United States
- Olinger AirparkIdent: OR81Country: United States
- Olive Branch AirportIdent: KOLVCountry: United States
- Oliveira AirportIdent: SNRZCountry: Brazil
- Oliver AirportIdent: CAU3Country: Canada
- Oliver Landing AirportIdent: 42TNCountry: United States
- Oliver Springs Inc AirportIdent: TN08Country: United States
- Olivia Regional AirportIdent: KOVLCountry: United States
- Olmstead Landing StripIdent: 73NYCountry: United States
- Olmstead Sky Ranch AirportIdent: ID25Country: United States
- Olmué AirportIdent: SCOMCountry: Chile
- Olney Municipal AirportIdent: KONYCountry: United States
- Olney Noble AirportIdent: KOLYCountry: United States
- Olomai AirstripIdent: SDRMCountry: Brazil
- Olomouc AirportIdent: LKOLCountry: Czechia
- Oloron Herrere AirfieldIdent: LFCOCountry: France
- Olsobip AirportIdent: AYOVCountry: Papua New Guinea
- Olson AerodromeIdent: SN40Country: United States
- Olson FieldIdent: NE30Country: United States
- Olson's AirportIdent: 3WI1Country: United States
- Olsztyn-Dajtki AirfieldIdent: EPODCountry: Poland
- Olsztyn-Mazury AirportIdent: EPSYCountry: Poland
- Oltman-Shuck AirportIdent: 83ILCountry: United States
- Olustee Municipal AirportIdent: F09Country: United States
- Olympia Regional AirportIdent: KOLMCountry: United States
- Olympic Dam AirportIdent: YOLDCountry: Australia
- Olympic FieldIdent: WA45Country: United States
- Olympus AirportIdent: 38TTCountry: United States
- Olyokminsk AirportIdent: UEMOCountry: Russia
- Omak AirportIdent: KOMKCountry: United States
- Omaka Blenheim AirportIdent: NZOMCountry: New Zealand
- Omar N Bradley AirportIdent: KMBYCountry: United States
- Omaura AirstripIdent: AYUOCountry: Papua New Guinea
- Omboue Hospital AirportIdent: FOOHCountry: Gabon
- Omega 1 AirportIdent: 12COCountry: United States
- Omeo AirportIdent: YOMOCountry: Australia
- Omicron Station AirportIdent: YOMICountry: Australia
- Omidiyeh AirportIdent: OIAJCountry: Iran
- Omni AirparkIdent: 6NY2Country: United States
- Omni AirportIdent: LA46Country: United States
- Omni Ranch Ultralight FlightparkIdent: 49XACountry: United States
- Omora AirportIdent: AYOMCountry: Papua New Guinea
- OMS UAS Test Range AirportIdent: US-9264Country: United States
- Omsk Central AirportIdent: UNOOCountry: Russia
- Omsk Severny AirportIdent: UNOSCountry: Russia
- Omsukchan AirportIdent: UHMFCountry: Russia
- On the Rocks AirportIdent: 1CA6Country: United States
- Ona AirparkIdent: K12VCountry: United States
- Ondangwa AirportIdent: FYOACountry: Namibia
- Ondwa AirportIdent: VA1HCountry: India
- One Arm Point AirportIdent: YOAPCountry: Australia
- One Eyed Creek AirportIdent: US-4465Country: United States
- One Grand FieldIdent: 5TN9Country: United States
- One Hundred Mile House AirportIdent: CAV3Country: Canada
- One Oak AirportIdent: 77KYCountry: United States
- One Particular Harbour Ultralight FlightparkIdent: US-4849Country: United States
- One Shot AirportIdent: OH09Country: United States
- One Sixty Four Place AirportIdent: TS02Country: United States
- Oneida Lake Strip AirportIdent: US-0759Country: United States
- Onida Municipal AirportIdent: K98DCountry: United States
- Onion Crest AirparkIdent: 43NECountry: United States
- Onkiola AirstripIdent: SDRPCountry: Brazil
- Onley AirportIdent: VG20Country: United States
- Onondowa/Rampi AirportIdent: ID-0113Country: Indonesia
- Ononge AirportIdent: AYQQCountry: Papua New Guinea
- Onslow AirportIdent: YOLWCountry: Australia
- Ontario International AirportIdent: KONTCountry: United States
- Ontario Municipal AirportIdent: KONOCountry: United States
- Ontonagon County Schuster FieldIdent: KOGMCountry: United States
- Onyon AirportIdent: VT43Country: United States
- Oodnadatta AirportIdent: YOODCountry: Australia
- Ooldea AirportIdent: YODACountry: Australia
- Oolenoy Valley AirportIdent: SC75Country: United States
- Oombulgurri AirportIdent: YFRVCountry: Australia
- Ooratippra AirportIdent: YORTCountry: Australia
- Oostburg AirportIdent: US-9079Country: United States
- Oostmalle AirfieldIdent: EBZRCountry: Belgium
- Oostwold AirfieldIdent: EHOWCountry: Netherlands
- Ootann AirportIdent: YOTNCountry: Australia
- Opapimiskan Lake AirportIdent: CKM8Country: Canada
- Open A-1 Ranch AirportIdent: 3LA8Country: United States
- Open Bay AirportIdent: AYOYCountry: Papua New Guinea
- Opheim AirportIdent: S00Country: United States
- Ophir AirportIdent: Z17Country: United States
- Opole-Kamień Śląski AirfieldIdent: EPKNCountry: Poland
- Oppenheim AirfieldIdent: EDGPCountry: Germany
- Optand AirfieldIdent: ESNMCountry: Sweden
- Oradea International AirportIdent: LRODCountry: Romania
- Oram AirportIdent: AYYOCountry: Papua New Guinea
- Oran Es-Sénia (Ahmed Ben Bella) International AirportIdent: DAOOCountry: Algeria
- Oran Tafraoui AirportIdent: DAOLCountry: Algeria
- Orang (Chongjin) AirportIdent: ZKHMCountry: North Korea
- Orange AirportIdent: YORGCountry: Australia
- Orange County AirportIdent: KMGJCountry: United States
- Orange County AirportIdent: KOMHCountry: United States
- Orange County AirportIdent: KORGCountry: United States
- Orange Grove Naval Auxiliary Landing FieldIdent: KNOGCountry: United States
- Orange Municipal AirportIdent: KORECountry: United States
- Orange Poultry Farm AirportIdent: 4NY1Country: United States
- Orange-Caritat (BA 115) Air BaseIdent: LFMOCountry: France
- Orangeburg Municipal AirportIdent: KOGBCountry: United States
- Orangeville / Castlewood FieldIdent: CPV2Country: Canada
- Orangeville / Laurel AirstripIdent: COL2Country: Canada
- Oranjemund AirportIdent: FYOGCountry: Namibia
- Orban AirportIdent: 51CCountry: United States
- Orbost AirportIdent: YORBCountry: Australia
- Orcas Island AirportIdent: KORSCountry: United States
- Orchard Ranch AirportIdent: WY38Country: United States
- Ord River AirportIdent: YORVCountry: Australia
- Ordos Ejin Horo International AirportIdent: ZBDSCountry: China
- Ordu–Giresun AirportIdent: LTCBCountry: Türkiye
- Oreck AirportIdent: MS88Country: United States
- Oregon Sky Ranch AirportIdent: OG33Country: United States
- Orellana AirportIdent: SPONCountry: Peru
- Orenburg Air BaseIdent: RU-6542Country: Russia
- Orenburg Central AirportIdent: UWOOCountry: Russia
- Oreshkovo AirfieldIdent: RU-3686Country: Russia
- Orestes Acosta AirportIdent: MUMOCountry: Cuba
- Ori AirportIdent: WI86Country: United States
- Orielton AirportIdent: YOITCountry: Australia
- Orient Well AirportIdent: YORWCountry: Australia
- Orillia-Rama Regional AirportIdent: CNJ4Country: Canada
- Oripää AirfieldIdent: EFOPCountry: Finland
- Oristano-Fenosu AirportIdent: LIERCountry: Italy
- Oritupano AirportIdent: SVOKCountry: Venezuela
- Oriximiná AirportIdent: SNOXCountry: Brazil
- Oriçanga de Abreu AirportIdent: SWPZCountry: Brazil
- Orlampa Inc Airport / Fantasy of FlightIdent: FA08Country: United States
- Orlando Apopka AirportIdent: KX04Country: United States
- Orlando Bezerra de Menezes AirportIdent: SBJUCountry: Brazil
- Orlando Chesini Ometto AirportIdent: SSBYCountry: Brazil
- Orlando de Carvalho AirportIdent: SSUMCountry: Brazil
- Orlando Executive AirportIdent: KORLCountry: United States
- Orlando International AirportIdent: KMCOCountry: United States
- Orlando North AirparkIdent: FA83Country: United States
- Orlando Sanford International AirportIdent: KSFBCountry: United States
- Orlando Villas Boas Regional AirportIdent: SWXMCountry: Brazil
- Orleans AirportIdent: K7I4Country: United States
- Orleans Farm AirportIdent: YORLCountry: Australia
- Orly AirparkIdent: KE-0034Country: Kenya
- Orléans-Bricy (BA 123) Air BaseIdent: LFOJCountry: France
- Orléans–Saint-Denis-de-l'Hôtel AirportIdent: LFOZCountry: France
- Ormara AirportIdent: OPORCountry: Pakistan
- Ormoc AirportIdent: RPVOCountry: Philippines
- Ormond Beach Municipal AirportIdent: KOMNCountry: United States
- Oro Negro AirportIdent: SVONCountry: Venezuela
- Orofino Municipal AirportIdent: S68Country: United States
- Orogrande AirportIdent: 75CCountry: United States
- Orono / Hawkefield AerodromeIdent: CA-0307Country: Canada
- Orono FieldIdent: COR3Country: Canada
- Oroville Municipal AirportIdent: KOVECountry: United States
- Orr AirportIdent: 24NECountry: United States
- Orr FieldIdent: NE25Country: United States
- Orr Ranch AirportIdent: 33NECountry: United States
- Orr Regional AirportIdent: KORBCountry: United States
- Orroroo AirportIdent: YORRCountry: Australia
- Orsa AirfieldIdent: ESNRCountry: Sweden
- Orsha Airport - Balbasovo Air BaseIdent: BY-0001Country: Belarus
- Orsk AirportIdent: UWORCountry: Russia
- Orth Pasture AirportIdent: US-2216Country: United States
- Orthodontic StripIdent: 5IN6Country: United States
- Ortner AirportIdent: KI64Country: United States
- Ortonville Municipal Airport/Martinson FieldIdent: KVVVCountry: United States
- Orum AerodromeIdent: 86NECountry: United States
- Orán AirportIdent: SASOCountry: Argentina
- Os Vaksinen Ulven AirfieldIdent: ENULCountry: Norway
- Osage City Municipal AirportIdent: 53KCountry: United States
- Osage Municipal AirportIdent: KD02Country: United States
- Osaka Itami International AirportIdent: RJOOCountry: Japan
- Osan Air BaseIdent: RKSOCountry: South Korea
- Osborn AirfieldIdent: 02FACountry: United States
- Osborne AirportIdent: 8CA0Country: United States
- Osborne Mine AirportIdent: YOSBCountry: Australia
- Osborne Municipal AirportIdent: KK75Country: United States
- Osceola Municipal AirportIdent: K7M4Country: United States
- Osceola Municipal AirportIdent: KI75Country: United States
- Oschatz AirfieldIdent: EDOQCountry: Germany
- Oscoda County/Dennis Kauffman Memorial AirportIdent: 51MCountry: United States
- Oscoda Wurtsmith AirportIdent: KOSCCountry: United States
- Osh International AirportIdent: UAFOCountry: Kyrgyzstan
- Oshakati AirportIdent: FYOSCountry: Namibia
- Oshawa Executive AirportIdent: CYOOCountry: Canada
- Oshima AirportIdent: RJTOCountry: Japan
- Oshkosh Sky Ranch AirportIdent: 2WN8Country: United States
- Osijek AirportIdent: LDOSCountry: Croatia
- Osijek-Čepin AirfieldIdent: LDOCCountry: Croatia
- Oskaloosa Municipal AirportIdent: KOOACountry: United States
- Oskarshamn AirportIdent: ESMOCountry: Sweden
- Oskemen International AirportIdent: UASKCountry: Kazakhstan
- Oslo Corners AirportIdent: US-7587Country: United States
- Oslo-Gardermoen International AirportIdent: ENGMCountry: Norway
- Osmany International AirportIdent: VGSYCountry: Bangladesh
- Oso Canyon AirportIdent: US-13020Country: United States
- Osovtsy Air BaseIdent: BY-0006Country: Belarus
- Osoyoos AirportIdent: CBB9Country: Canada
- Ospika AirportIdent: CBA9Country: Canada
- Ossima AirportIdent: AYZSCountry: Papua New Guinea
- Ossora AirportIdent: UHPDCountry: Russia
- Ostend-Bruges International AirportIdent: EBOSCountry: Belgium
- Ostergard's AirportIdent: CDO2Country: Canada
- Ostlunds AirportIdent: US-1251Country: United States
- Ostrov Naval Air BaseIdent: RU-0064Country: Russia
- Osvaldo Vieira International AirportIdent: GGOVCountry: Guinea-Bissau
- Oswaldo Guevara Mujica AirportIdent: SVACCountry: Venezuela
- Oswego County AirportIdent: KFZYCountry: United States
- Oswego Municipal AirportIdent: K67Country: United States
- Osório AirportIdent: SSOSCountry: Brazil
- Otero Mill AirportIdent: 72NMCountry: United States
- Othello Municipal AirportIdent: KS70Country: United States
- Otone AirfieldIdent: JP-0092Country: Japan
- Ott Farms AirportIdent: 7TS8Country: United States
- Ott's Landing AirportIdent: 0FA1Country: United States
- Ottawa / Carp AirportIdent: CYRPCountry: Canada
- Ottawa / Gatineau AirportIdent: CYNDCountry: Canada
- Ottawa / Manotick (Hope Field)Ident: CHF2Country: Canada
- Ottawa / Rockcliffe AirportIdent: CYROCountry: Canada
- Ottawa Executive AirportIdent: KZ98Country: United States
- Ottawa Macdonald-Cartier International AirportIdent: CYOWCountry: Canada
- Ottawa Municipal AirportIdent: KOWICountry: United States
- Ottawa/Embrun AerodromeIdent: CPR2Country: Canada
- Ottenschlag AirfieldIdent: LOAACountry: Austria
- Otter Lake AirportIdent: CJV4Country: Canada
- Otterbach Farm AirportIdent: 81LLCountry: United States
- Ottertail Lake AirportIdent: US-1274Country: United States
- Ottman Landing AirportIdent: 5WN9Country: United States
- Ottos AirportIdent: 88WSCountry: United States
- Ottumwa Regional AirportIdent: KOTMCountry: United States
- Otu AirportIdent: SKOTCountry: Colombia
- Oua Tom AirportIdent: NWWTCountry: New Caledonia
- Ouadi Doum Air BaseIdent: FTFYCountry: Chad
- Ouagadougou Thomas Sankara International AirportIdent: DFFDCountry: Burkina Faso
- Ouani AirportIdent: FMCVCountry: Comoros
- Ouarzazate International AirportIdent: GMMZCountry: Morocco
- Oudtshoorn AirportIdent: FAOHCountry: South Africa
- Ouessant AirportIdent: LFECCountry: France
- Ouesso AirportIdent: FCOUCountry: Congo - Brazzaville
- Oujda Angads AirportIdent: GMFOCountry: Morocco
- Oulu AirportIdent: EFOUCountry: Finland
- Oum AirstripIdent: AYZUCountry: Papua New Guinea
- Our Domain AirportIdent: 7MD0Country: United States
- Ourdel AirportIdent: YODLCountry: Australia
- Ourilândia do Norte AirportIdent: SDOWCountry: Brazil
- Ouro Branco AirportIdent: SNDOCountry: Brazil
- Ouro Fino AirportIdent: SNOFCountry: Brazil
- Ouro Sogui AirportIdent: GOSMCountry: Senegal
- Ousel Falls AirportIdent: MT94Country: United States
- Outback AirportIdent: 5XS7Country: United States
- Outback Ranch AirstripIdent: AZ01Country: United States
- Outeiros da Brisas AirportIdent: SNECCountry: Brazil
- Outland Serra da Mesa AirportIdent: SD1ZCountry: Brazil
- Outlaw Flyers AirportIdent: 16XSCountry: United States
- Outlook (South) AirportIdent: CCL9Country: Canada
- Ouvéa AirportIdent: NWWVCountry: New Caledonia
- Ouyen AirportIdent: YOUYCountry: Australia
- Ouzkani AirportIdent: OP15Country: Pakistan
- Ovar Air BaseIdent: LPOVCountry: Portugal
- Ovda AirportIdent: LLOVCountry: Israel
- Over the Hill AirportIdent: 12SCCountry: United States
- Overberg AirportIdent: FAOBCountry: South Africa
- Overboelare AirfieldIdent: EBGGCountry: Belgium
- Overland-Lohse FieldIdent: NA92Country: United States
- Overton Private AirportIdent: 4LA8Country: United States
- Ovid AirportIdent: D82Country: United States
- Owando AirportIdent: FCOOCountry: Congo - Brazzaville
- Owasco AirportIdent: K2N4Country: United States
- Owatonna Degner Regional AirportIdent: KOWACountry: United States
- Owen Air ParkIdent: 0KY0Country: United States
- Owen Bros AirportIdent: MT01Country: United States
- Owen FieldIdent: 20AKCountry: United States
- Owen FieldIdent: 4XA3Country: United States
- Owen FieldIdent: KH58Country: United States
- Owen Roberts International AirportIdent: MWCRCountry: Cayman Islands
- Owen Sound (Cook Field)Ident: CCK5Country: Canada
- Owen Sound / Billy Bishop Regional AirportIdent: CYOSCountry: Canada
- Owen-Withee AirportIdent: WS42Country: United States
- Owensboro Daviess County AirportIdent: KOWBCountry: United States
- Owl Canyon GliderportIdent: 4CO2Country: United States
- Owosso Community AirportIdent: KRNPCountry: United States
- Owyhee AirportIdent: K10UCountry: United States
- Owyhee Reservoir State AirportIdent: 28UCountry: United States
- Ox Meadows AirportIdent: 04WACountry: United States
- Oxbow AirportIdent: CJW2Country: Canada
- Oxbow AirportIdent: OR12Country: United States
- Oxbow Ranch AirportIdent: OR17Country: United States
- Oxford County Regional AirportIdent: K81BCountry: United States
- Oxford House AirportIdent: CYOHCountry: Canada
- Oxnard AirportIdent: KOXRCountry: United States
- Oxy A 103 AirportIdent: HLZGCountry: Libya
- Oyem AirportIdent: FOGOCountry: Gabon
- Oyen Municipal AirportIdent: CED3Country: Canada
- Oyo Ollombo AirportIdent: FCODCountry: Congo - Brazzaville
- Oz AirportIdent: 2KY4Country: United States
- Ozark AerodromeIdent: AR11Country: United States
- Ozark Franklin County AirportIdent: K7M5Country: United States
- Ozark Regional AirportIdent: KBPKCountry: United States
- Ozark Skies AirparkIdent: 05ARCountry: United States
- Ozark-Blackwell FieldIdent: K71JCountry: United States
- Ozaukee AirportIdent: 9WN3Country: United States
- Ozerne Air BaseIdent: UKKOCountry: Ukraine
- Ozona Municipal AirportIdent: KOZACountry: United States
- Ozuki AirfieldIdent: RJOZCountry: Japan
- Ozurgeti Air BaseIdent: GE-0007Country: Georgia
- Očová AirfieldIdent: LZOCCountry: Slovakia
- Óbidos Municipal AirportIdent: SNTICountry: Brazil
- Ölanda AirfieldIdent: ESMZCountry: Sweden
- Ölgii Mongolei International AirportIdent: ZMULCountry: Mongolia
- Örebro AirportIdent: ESOECountry: Sweden
- Öresten AirfieldIdent: ESGMCountry: Sweden
- Örnsköldsvik AirportIdent: ESNOCountry: Sweden
- Ørland AirportIdent: ENOLCountry: Norway
- Ørsta-Volda Airport, HovdenIdent: ENOVCountry: Norway
- Őcsény AirfieldIdent: LHOYCountry: Hungary