- Nzérékoré AirportIdent: GUNZCountry: Guinea
- Näsinge AirfieldIdent: ESGSCountry: Sweden
- Néma AirportIdent: GQNICountry: Mauritania
- Nîmes Courbessac AirfieldIdent: LFMECountry: France
- Nördlingen AirfieldIdent: EDNOCountry: Germany
- Nötsch im Gailtal AirfieldIdent: LOKNCountry: Austria
- 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
- 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
- Oakhill AirparkIdent: SC82Country: 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
- Oasis Ranger Station - US Government AirportIdent: 9FL7Country: United States
- Oban AirportIdent: EGEOCountry: United Kingdom
- 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
- 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: 26NCountry: United States
- Ocean County AirportIdent: KMJXCountry: United States