- Orange Grove Naval Auxiliary Landing FieldIdent: KNOGCountry: United States
- Orange Municipal AirportIdent: KORECountry: United States
- Orange Poultry Farm AirportIdent: 4NY1Country: United States
- Orangeville / Castlewood FieldIdent: CPV2Country: Canada
- Orangeville / Laurel AirstripIdent: COL2Country: Canada
- Orban AirportIdent: 51CCountry: United States
- Orbost AirportIdent: YORBCountry: Australia
- Orchard Ranch AirportIdent: WY38Country: United States
- Ord River AirportIdent: YORVCountry: Australia
- Oreck AirportIdent: MS88Country: United States
- Oregon Sky Ranch AirportIdent: OG33Country: United States
- Orellana AirportIdent: SPONCountry: Peru
- Orenburg Air BaseIdent: RU-6542Country: Russia
- 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 North AirparkIdent: FA83Country: 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–Saint-Denis-de-l'Hôtel AirportIdent: LFOZCountry: France
- Ormara AirportIdent: OPORCountry: Pakistan
- 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
- 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
- Os Vaksinen Ulven AirfieldIdent: ENULCountry: Norway
- Osage City Municipal AirportIdent: 53KCountry: United States
- Osage Municipal AirportIdent: KD02Country: United States
- 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