International airports, regional fields and GA aerodromes — the places every mission starts and ends.

| Company | Type | Location | Codes |
|---|---|---|---|
| Okeechobee County Airport | international | Okeechobee, United States | IATA OBE · ICAO KOBE |
| Okeelanta Airport | aerodrome | United States | — |
| Okeene Municipal Airport | aerodrome | United States | — |
| Okemah Municipal Airport | aerodrome | United States | — |
| Okepuha Station Airfield | aerodrome | New Zealand | — |
| OK Flying Club Incorporated Airport | aerodrome | United States | — |
| Okha Airport | international | Russia | IATA OHH · ICAO UHSH |
| Okhika Airstrip | aerodrome | Indonesia | ICAO WA0P |
| Okhlopkovo | aerodrome | Russia | — |
| Okhotsk Airport | international | Russia | IATA OHO · ICAO UHOO |
| Oki Airport | international | Japan | IATA OKI · ICAO RJNO |
| Okinoerabu Airport |
aerodrome 30,878international 8,351military airfield 1,867private airstrip 1,800heliport 555regional 460
United States 15,232Brazil 2,982Australia 2,025Canada 1,765France 1,355Russia 1,265United Kingdom 1,109South Africa 938Germany 879Colombia 835Italy 718Indonesia 681Argentina 621Ukraine 570Papua New Guinea 536China 489Mexico 478Venezuela 468Spain 414India 411Namibia 376Chile 358Congo - Kinshasa 356South Sudan 331Poland 327Czechia 277New Zealand 250Kenya 242Sweden 222Japan 195Philippines 188Norway 179Botswana 151Portugal
Operators claiming an entry can correct facts, add services and certificates, and mark their page verified. Claiming is free — see a company’s page for the claim link.
| international |
| Japan |
| IATA OKE · ICAO RJKB |
| Ok Isai Airstrip | aerodrome | Papua New Guinea | ICAO AYOH |
| Okiwi Station Airport | aerodrome | New Zealand | ICAO NZOX |
| Oklahoma National Guard | military airfield | United States | — |
| Oklahoma State University Unmanned Aircraft Flight Station (UAFS) | military airfield | United States | — |
| Okmulgee Regional Airport | international | Okmulgee, United States | IATA OKM · ICAO KOKM |
| Okny Airfield | aerodrome | Ukraine | — |
| Okolona Municipal-Richard Stovall Field | aerodrome | United States | — |
| Okombahe Airfield | aerodrome | Namibia | ICAO FYAH |
| Okongo Airport | aerodrome | Namibia | ICAO FYKG |
| Okonjima Airfield | aerodrome | Namibia | ICAO FYKN |
| Okorusu Mine Airfield | aerodrome | Namibia | ICAO FYKR |
| Okosongomingo Airstrip | aerodrome | Namibia | ICAO FYOZ |
| Okosongoro Airfield | aerodrome | Namibia | ICAO FY2Y |
| Okoyo Airport | international | Congo - Brazzaville | IATA OKG |
| Okpahik | aerodrome | Indonesia | — |
| Okpyeong-ri Airport | aerodrome | North Korea | — |
| Oksapmin Airport | international | Papua New Guinea | IATA OKP · ICAO AYOJ |
| Oksibil Airport | international | Indonesia | IATA OKL · ICAO WAJO |
| Oktes lidlauks | private airstrip | Latvia | — |
| Oktibbeha Airport | aerodrome | Starksville, United States | — |
| Oktyaber'skiy | aerodrome | Russia | — |
| Oktyabrskiy | aerodrome | Russia | ICAO ULKO |
| Oktyabrskiy Airfield | aerodrome | Russia | — |
| Oktyabrskoye Air Base | military airfield | Ukraine | — |
| Oktyabrskoye Air Base | military airfield | Russia | — |
| Oktyabrsky Airport | international | Russia | IATA OKT · ICAO UWUK |
| Okushiri Airport | international | Japan | IATA OIR · ICAO RJEO |
| Okyago | aerodrome | Indonesia | — |
| Okyap Airstrip | international | Indonesia | IATA OKY |
| Olafson Brothers Airport | aerodrome | United States | — |
| Olavo Cecco Rigon Airport | international | Brazil | IATA CCI · ICAO SSCK |
| Olaya Herrera Airport | international | Colombia | IATA EOH · ICAO SKMD |
| Olbia-Costa Smeralda Airport | international | Italy | IATA OLB · ICAO LIEO |
| Olcott-Newfane Airport | aerodrome | United States | — |
| Old 66 Strip | aerodrome | United States | — |
| Old Abudwaq Runway | aerodrome | Ethiopia | — |
| Old airfield | military airfield | Russia | — |
| Old Airport | aerodrome | Ethiopia | — |