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| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
 |
Oak Harbor | ODW | United States | US | 67 |
|
Oakey | OKY | Australia | AU | 802 |
|
Oakland International Airport | OAK | United States | US | 67 |
|
Oakland/Coliseum Stat | OBT | United States | US | 67 |
|
Oamaru | OAM | New Zealand (Aotearoa) | NZ | 851 |
|
Oban | OBA | Australia | AU | 802 |
|
Oban Airport | OBN | United Kingdom | GB | 493 |
|
Obano | OBD | Indonesia | ID | 832 |
|
Obbia | CMO | Somalia | SO | 573 |
|
Oberpfaffenhofen | OBF | Germany | DE | 429 |
|
Obidos | OBI | Brazil | BR | 316 |
|
Obihiro | OBO | Japan | JP | 736 |
|
Obo | OBX | Papua New Guinea | PG | 804 |
|
Obock | OBC | Djibouti | DJ | 525 |
|
Obre Lake | YDW | Canada | CA | 906 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Ocean Falls | ZOF | Canada | CA | 906 |
|
Ocean Reef | OCA | United States | US | 67 |
|
Oceanic | OCI | United States | US | 67 |
|
Oconee County | CEU | United States | US | 67 |
|
Octeville | LEH | France | FR | 427 |
|
Ocussi | OEC | Indonesia | ID | 832 |
|
Odate Noshiro | ONJ | Japan | JP | 736 |
|
Oddor Meanche | OMY | Cambodia | KH | 709 |
|
Odessa International | ODS | Ukraine | UA | 488 |
|
Odienne | KEO | Cote D'Ivoire (Ivory Coast) | CI | 533 |
|
Oenpelli | OPI | Australia | AU | 802 |
|
Off Line Point | ZJK | Hong Kong | HK | 729 |
|
Off Line Point | WUK | United Kingdom | GB | 493 |
|
Off Line Point | WGF | Bahrain | BH | 605 |
|
Off Line Point | WGZ | Australia | AU | 802 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Off line Point | XZE | Germany | DE | 429 |
|
Off line Point | XZJ | Japan | JP | 736 |
|
Off line Point | XZU | United States | US | 67 |
|
Off line Point | XZX | Australia | AU | 802 |
|
Ofu | OFU | American Samoa | AS | 5 |
|
Ogdensburg | OGS | United States | US | 67 |
|
Ogeranang | OGE | Papua New Guinea | PG | 804 |
|
Ogle | OGL | Guyana | GY | 350 |
|
Ogoki | YOG | Canada | CA | 906 |
|
Ohio County | HLG | United States | US | 67 |
|
Ohio State University | OSU | United States | US | 67 |
|
Ohio University | ATO | United States | US | 67 |
|
Ohrid | OHD | Macedonia | MK | 497 |
|
Oiapoque | OYK | Brazil | BR | 316 |
|
Oita | OIT | Japan | JP | 736 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Okaba | OKQ | Indonesia | ID | 832 |
|
Okadama | OKD | Japan | JP | 736 |
|
Okao | OKV | Papua New Guinea | PG | 804 |
|
Okaukuejo | OKF | Namibia | NA | 575 |
|
Okayama | OKJ | Japan | JP | 736 |
|
Okhotsk | OHO | Russian Federation | RU | 770 |
|
Oki Island | OKI | Japan | JP | 736 |
|
Okino Erabu | OKE | Japan | JP | 736 |
|
Okmulgee | OKM | United States | US | 67 |
|
Okondja | OKN | Gabon | GA | 526 |
|
Okoyo | OKG | Congo | CG | 515 |
|
Oksapmin | OKP | Papua New Guinea | PG | 804 |
|
Oksibil | OKL | Indonesia | ID | 832 |
|
Oktiabrskij | OKT | Russian Federation | RU | 770 |
|
Okushiri | OIR | Japan | JP | 736 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Olafsfjordur | OFJ | Iceland | IS | 439 |
|
Olanchito | OAN | Honduras | HN | 131 |
|
Olavarria | OVR | Argentina | AR | 303 |
|
Old Crow | YOC | Canada | CA | 906 |
|
Old Fort Bay | ZFB | Canada | CA | 906 |
|
Old Harbor SPB | OLH | United States | US | 67 |
|
Old Town | OLD | United States | US | 67 |
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Olf Usn | NEN | United States | US | 67 |
|
Olga Bay SPB | KOY | United States | US | 67 |
|
Olive Branch Arpt | OLV | United States | US | 67 |
|
Oliver Reginald Tambo International (Jan Smuts International) | JNB | South Africa | ZA | 562 |
|
Olney | ONY | United States | US | 67 |
|
Olney-Noble | OLY | United States | US | 67 |
|
Olomouc | OLO | Czech Republic | CZ | 418 |
|
Olpoi | OLJ | Vanuatu | VU | 885 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Olsobip | OLQ | Papua New Guinea | PG | 804 |
|
Olympia | OLM | United States | US | 67 |
|
Olympic Dam | OLP | Australia | AU | 802 |
|
Omboue | OMB | Gabon | GA | 526 |
|
Omega | OMG | Namibia | NA | 575 |
|
Omidieh | OMI | Iran | IR | 632 |
|
Omkalai | OML | Papua New Guinea | PG | 804 |
|
Omora | OSE | Papua New Guinea | PG | 804 |
|
Omsk | OMS | Russian Federation | RU | 770 |
|
Omura | OMJ | Japan | JP | 736 |
|
Ondangwa | OND | Namibia | NA | 575 |
|
Oneal | OEA | United States | US | 67 |
|
Oneida County | RHI | United States | US | 67 |
|
Oneida County | UCA | United States | US | 67 |
|
Onepusu | ONE | Solomon Islands | SB | 874 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Ongava Game Reserve | OGV | Namibia | NA | 575 |
|
Ongiva | VPE | Angola | AO | 502 |
|
Onion Bay | ONN | United States | US | 67 |
|
Ono I Lau | ONU | Fiji | FJ | 821 |
|
Ononge | ONB | Papua New Guinea | PG | 804 |
|
Onotoa | OOT | Kiribati | KI | 824 |
|
Onslow | ONS | Australia | AU | 802 |
|
Ontario International | ONT | United States | US | 67 |
|
Ontario Municipal Airport | ONO | United States | US | 67 |
|
Ontong Java | OTV | Solomon Islands | SB | 874 |
|
Oodnadatta | ODD | Australia | AU | 802 |
|
Opa Locka | OPF | United States | US | 67 |
|
Open Bay | OPB | Papua New Guinea | PG | 804 |
|
Ophira International | SSH | Egypt | EG | 591 |
|
Opuwa | OPW | Namibia | NA | 575 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Oradea | OMR | Romania | RO | 473 |
|
Oram | RAX | Papua New Guinea | PG | 804 |
|
Oran | ORA | Argentina | AR | 303 |
|
Orange County | MGJ | United States | US | 67 |
|
Orange County Steel Salvage Heliport | ANA | United States | US | 67 |
|
Orange Walk | ORZ | Belize | BZ | 106 |
|
Oranjemund | OMD | Namibia | NA | 575 |
|
Orapa | ORP | Botswana | BW | 510 |
|
Orbost | RBS | Australia | AU | 802 |
|
Orcas Island | ESD | United States | US | 67 |
|
Orchid Island | KYD | Taiwan | TW | 781 |
|
Ord River | ODR | Australia | AU | 802 |
|
Orebro-bofors | ORB | Sweden | SE | 484 |
|
Orel | OEL | Russian Federation | RU | 770 |
|
Orenburg | REN | Russian Federation | RU | 770 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Orestes Acosta | MOA | Cuba | CU | 219 |
|
Oria | OTY | Papua New Guinea | PG | 804 |
|
Orientos | OXO | Australia | AU | 802 |
|
Orinduik | ORJ | Guyana | GY | 350 |
|
Orio al Serio | BGY | Italy | IT | 450 |
|
Oriximina | ORX | Brazil | BR | 316 |
|
Orkney Island | KOI | United Kingdom | GB | 493 |
|
Orland | OLA | Norway | NO | 465 |
|
Orlando Executive | ORL | United States | US | 67 |
|
Orlando International | MCO | United States | US | 67 |
|
Orlando Sanford Intl | SFB | United States | US | 67 |
|
Orleans | ORE | France | FR | 427 |
|
Orly | ORY | France | FR | 427 |
|
Ormara | ORW | Pakistan | PK | 764 |
|
Ormoc | OMC | Philippines | PH | 766 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Ornskoldsvik | OER | Sweden | SE | 484 |
|
Oro Negro | CBS | Venezuela | VE | 388 |
|
Orocue | ORC | Colombia | CO | 327 |
|
Oroville | OVE | United States | US | 67 |
|
Orsk | OSW | Russian Federation | RU | 770 |
|
Oruro | ORU | Bolivia | BO | 312 |
|
Osage Beach | OSB | United States | US | 67 |
|
Osan AB | OSN | Korea (South) | KR | 778 |
|
Oscar Reguera | HOS | Argentina | AR | 303 |
|
Osh International Airport | OSS | Kyrgyzstan | KG | 743 |
|
Oshakati | OHI | Namibia | NA | 575 |
|
Oshawa | YOO | Canada | CA | 905 |
|
Oshima | OIM | Japan | JP | 736 |
|
Oshkosh | OKS | United States | US | 67 |
|
Osijek | OSI | Croatia (hrvatska) | HR | 415 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Oskarshamn | OSK | Sweden | SE | 484 |
|
Oslo - Gardermoen Airport | GEN | Norway | NO | 465 |
|
Oslo Airport, Gardermoen | OSL | Norway | NO | 465 |
|
Osmanabad | OMN | India | IN | 733 |
|
Osmani International | ZYL | Bangladesh | BD | 703 |
|
Ossima | OSG | Papua New Guinea | PG | 804 |
|
Ostend/Bruges International Airport | OST | Belgium | BE | 409 |
|
Osvaldo Vieira International | OXB | Guinea-bissau | GW | 559 |
|
Otis AFB | FMH | United States | US | 67 |
|
Otjiwarongo | OTJ | Namibia | NA | 575 |
|
Otsego County | GLR | United States | US | 67 |
|
Ottawa Macdonald-Cartier International | YOW | Canada | CA | 906 |
|
Otu | OTU | Colombia | CO | 327 |
|
Ouadda | ODA | Central African Republic | CF | 509 |
|
Ouagadougou | OUA | Burkina Faso | BF | 226 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Ouahigouya | OUG | Burkina Faso | BF | 593 |
|
Ouanda Djalle | ODJ | Central African Republic | CF | 509 |
|
Ouanga | OUU | Gabon | GA | 526 |
|
Ouango Fitini | OFI | Cote D'Ivoire (Ivory Coast) | CI | 533 |
|
Ouani | AJN | Comoros | KM | 513 |
|
Ouarzazate | OZZ | Morocco | MA | 548 |
|
Oudomxai | ODY | Laos | LA | 744 |
|
Oudtshoorn | OUH | South Africa | ZA | 562 |
|
Oued Irara Apt | HME | Algeria | DZ | 500 |
|
Ouesso | OUE | Congo | CG | 515 |
|
Oulu | OUL | Finland | FI | 425 |
|
Oum Hadjer | OUM | Chad | TD | 511 |
|
Ourilandia | OIA | Brazil | BR | 316 |
|
Ourinhos | OUS | Brazil | BR | 316 |
|
Outagamie County | ATW | United States | US | 67 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Outer Skerries | OUK | United Kingdom | GB | 493 |
|
Outlaw Field | CKV | United States | US | 67 |
|
Ouvea | UVE | New Caledonia | NC | 846 |
|
Ouyen | OYN | Australia | AU | 802 |
|
Ouzinkie SPB | KOZ | United States | US | 67 |
|
Ovalle | OVL | Chile | CL | 324 |
|
Ovda | VDA | Israel | IL | 636 |
|
Overberg (FAOB) | OVG | South Africa | ZA | 562 |
|
Owando | FTX | Congo | CG | 515 |
|
Owatonna | OWA | United States | US | 67 |
|
Owen Roberts International | GCM | Cayman Islands | KY | 233 |
|
Owendo | OWE | Gabon | GA | 526 |
|
Owens Field | CUB | United States | US | 67 |
|
Oxford (Kidlington) | OXF | United Kingdom | GB | 493 |
|
Oxford House | YOH | Canada | CA | 906 |
| Airport name | Airport Code | Country Name | Country Abbrev. | World Area Code | |
|
Oxnard | SZP | United States | US | 67 |
|
Oyem | OYE | Gabon | GA | 526 |
|
Ozona Municipal | OZA | United States | US | 67 |