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| United State Airports (Select Airports by State Name) |
| International Airports (Select Airports by Country Name) |
| Or Select Airport by City Name : |
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
| City | Airport | Country | Code |
| O"Neill | O'Neill Airport | USA | ONL |
| Oachas Nek | Qachas Nek Airport | Lesotho | UNE |
| Oak Harbor | Oak Harbor Air Park | USA | ODW |
| Oakey | Oakey Airport | Australia | OKY |
| Oakland | Garrett County Airport | USA | ODM |
| Oakland | Oakland Intl. Airport | USA | OAK |
| Oaktown | Green Airport | USA | OTN |
| Oamaru | Oamaru Airport | New Zealand | OAM |
| Oaxaca | Xoxocotlan Airport | Mexico | OAX |
| Oban | Connel Airport | United Kingdom | OBN |
| Oban | Oban Airport | Australia | OBA |
| Obano | Obano Airport | Indonesia | OBD |
| Obbia | Obbia Airport | Somalia | CMO |
| Oberpfaffenhofen | Oberpfaffenhofen Airport | Germany | OBF |
| Obidos | Obidos Airport | Brazil | OBI |
| Obihiro | Obihiro Airport | Japan | OBO |
| Obo | Obo Airport | Papua New Guinea | OBX |
| Obock | Obock Airport | Djibouti | OBC |
| Obre Lake | Obre Lake Airport | Canada | YDW |
| Ocala | Ocala Regional Airport | USA | OCF |
| Ocana | Ocana Municipal Airport | Columbia | OCV |
| Ocean City | Ocean City Municipal Airport | USA | OCE |
| Ocean Falls | Ocean Falls Airport | Canada | ZOF |
| Ocean Reef Club | Ocean Reef Club Airport | USA | OCA |
| Oceana | Oceana Airport | USA | NTU |
| Oceanic | Oceanic Airport | USA | OCI |
| Oceanside | Oceanside Municipal Airport | USA | OCN |
| Ocho Rios | Boscobel Airport | Jamaica | OCJ |
| Ocussi | Ocussi Airport | East Timor | OEC |
| Odate Noshiro | Onate Noshiro Airport | Japan | ONJ |
| Oddor Meanchey | Oddor Meanchey Airport | Cambodia | OMY |
| Odense | Odense Airport | Denmark | ODE |
| Odense | Odense Rail Station | Denmark | ZBQ |
| Odessa | Odessa Airport | Ukraine | ODS |
| Odienne | Odienne Airport | Ivory Coast | KEO |
| Oenpelli | Oenpelli Airport | Australia | OPI |
| Ofu Island | Ofu Airport | American Samoa | OFU |
| Ogallala | Ogallala Airport | USA | OGA |
| Ogden | Ogden Municipal Airport | USA | OGD |
| Ogdensburg | Ogdensburg Intl. Airport | USA | OGS |
| Ogeranang | Ogeranang Airport | Papua New Guinea | OGE |
| Ogle | Ogle Airport | Guyana | OGL |
| Ogoki | Ogoki Airport | Canada | YOG |
| Ohotsk | Okhotsk Airport | Russia | OHO |
| Ohrid | Ohrid Airport | Macedonia | OHD |
| Oiapoque | Oiapoque Airport | Brazil | OYK |
| Oita | Oita Airport | Japan | OIT |
| Okaba | Okaba Airport | Indonesia | OKQ |
| Okaukuejo | Okaukuejo Airport | Namibia | OKF |
| Okayama | Okayama Airport | Japan | OKJ |
| Okeechobee | Okeechobee County Airport | USA | OBE |
| Oki Island | Oki Island Airport | Japan | OKI |
| Okinawa | Naha Field | Japan | OKA |
| Okino Erabu | Okino Erabu Airport | Japan | OKE |
| Oklahoma | Altus Municipal Airport | USA | AXS |
| Oklahoma City | Will Rogers World Airport | USA | OKC |
| Okmulgee | Okmulgee Municipal Airport | USA | OKM |
| Okondja | Okondja Airport | Gabon | OKN |
| Okoyo | Okoyo Airport | Congo | OKG |
| Oksapmin | Oksapmin Airport | Papua New Guinea | OKP |
| Oksibil | Oksibil Airport | Indonesia | OKL |
| Oktiabrskij | Oktabrskij Airport | Russia | OKT |
| Okushiri | Okushiri Airport | Japan | OIR |
| Olafsfjordur | Olafsfjordur Airport | Iceland | OFJ |
| Olafsvik | Olafsvik Airport | Iceland | OLI |
| Olanchito | Olanchito Airport | Honduras | OAN |
| Olathe | Johnson County Executive Airport | USA | OJC |
| Olavarria | Olavarria Airport | Argentina | OVR |
| Olbia | Costa Smeralda Airport | Italy | OLB |
| Old Crow | Old Crow Municipal Airport | Canada | YOC |
| Old Fort Bay | Old Fort Bay Airport | Canada | ZFB |
| Old Harbor | Russell Field | USA | OLH |
| Old Town | Old Town Municipal Airport | USA | OLD |
| Oldenburg | Oldenburg | Germany | ZPD |
| Olean | Olean Airport | USA | OLE |
| Olive Branch | Olive Branch Airport | USA | OLV |
| Olney | Olney Airport | USA | ONY |
| Olney | Noble Airport | USA | OLY |
| Olomouc | Olomouc Airport | Czech Republic | OLO |
| Olpoi | Olpoi Airport | Vanuatu | OLJ |
| Olsobip | Olsobip Airport | Papua New Guinea | OLQ |
| Olympia | Olympia Airport | USA | OLM |
| Olympic Dam | Olympic Dam Airport | Australia | OLP |
| Omaha | Eppley Airfield | USA | OMA |
| Omak | Omak Airport | USA | OMK |
| Omboue | Omboue Airport | Gabon | OMB |
| Omega | Omega Airport | Namibia | OMG |
| Omkalai | Omkalai Airport | Papua New Guinea | OML |
| Omora | Omora Airport | Papua New Guinea | OSE |
| Omsk | Omsk Airport | Russia | OMS |
| Omura | Omura Airport | Japan | OMJ |
| Ondangwa | Ondangwa Airport | Namibia | OND |
| Oneonta | Oneonta Municipal Airport | USA | ONH |
| Onepusu | Onepusu Airport | Solomon Islands | ONE |
| Ongava Game Reserve | Ongavia Game Reserve Airport | Namibia | OGV |
| Ongiva | Ongiva Airport | Angola | VPE |
| Onion Bay | Onion Bay Airport | USA | ONN |
| Ono I Lau | Ono I Lau Airport | Fiji | ONU |
| Ononge | Ononge Airport | Papua New Guinea | ONB |
| Onotoa | Onotoa Airport | Kiribati | OOT |
| Onslow | Onslow Airport | Australia | ONS |
| Ontario | Ontario Intl. Airport | USA | ONT |
| Ontario | Ontario Municipal Airport | USA | ONO |
| Ontong Java | Ontong Java Airport | Solomon Islands | OTV |
| Onundarfjordur | Onundarfjordur | Iceland | HLO |
| Oodnadatta | Oodnadatta Airport | Australia | ODD |
| Opapamisak Lake | Opapamiska Lake Airport | Canada | YBS |
| Opelousas | Opelousas Airport | USA | OPL |
| Open Bay | Open Bay Airport | Papua New Guinea | OPB |
| Opuwa | Opuwa Airport | Namibia | OPW |
| Oradea | Oradea Airport | Romania | OMR |
| Oran | Es Senia Airport | Algeria | ORN |
| Oran | Oran Airport | Argentina | ORA |
| Oran Algeria | Tafaraoui Airport | Algeria | TAF |
| Orange | Springhill Airport | Australia | OAG |
| Orange Walk | Orange Walk Airport | Belize | ORZ |
| Orangeburg | Orangeburg Airport | USA | OGB |
| Oranjemund | Oranjemund Airport | Namibia | OMD |
| Orapa | Orapa Airport | Botswana | ORP |
| Orbost | Orbost Airport | Australia | RBS |
| Orchid Beach | Orchid Beach Airport | Australia | OKB |
| Orchid Island | Orchid Island Airport | Taiwan | KYD |
| Ord River | Ord River Airport | Australia | ODR |
| Orebro | Bofors Airport | Sweden | ORB |
| Orel | Orel Airport | Russia | OEL |
| Orenburg | Orenburg Airport | Russia | REN |
| Oria | Oria Airport | Papua New Guinea | OTY |
| Orientos | Orientos Airport | Australia | OXO |
| Orinduik | Orinduik Airport | Guyana | ORJ |
| Oriximina | Oriximina Airport | Brazil | ORX |
| Orkney Island | Kirkwall Airport | United Kingdom | KOI |
| Orland | Orland Airport | Norway | OLA |
| Orlando | Orlando Intl. Airport | USA | MCO |
| Orlando | Herndon Airport | USA | ORL |
| Orleans | Orleans Airport | France | ORE |
| Ormara | Ormara Airport | Pakistan | ORW |
| Ormoc | Ormoc Airport | Philippines | OMC |
| Ornskoldsvik | Ornskoldsvik Airport | Sweden | OER |
| Orocue | Orocue Airport | Columbia | ORC |
| Oroville | Oroville Municipal Airport | USA | OVE |
| Orpheus Island | Orpheus Island Resort Airport | Australia | ORS |
| Orsk | Orsk Airport | Russia | OSW |
| Orsta-Volda | Hovden Airport | Norway | HOV |
| Oruro | Oruro Airport | Bolivia | ORU |
| Osage Beach | Osage Beach Airport | USA | OSB |
| Osaka | Kansai Intl. Airport | Japan | KIX |
| Osaka | Osaka | Japan | OSA |
| Osaka | Itami Airport | Japan | ITM |
| Osceola | Osceola Airport | USA | OEO |
| Oscoda | Wurtsmith Airport | USA | OSC |
| Osh | Osh Airport | Kyrgyzstan | OSS |
| Oshakati | Oshakati Airport | Namibia | OHI |
| Oshawa | Oshawa Airport | Canada | QWA |
| Oshima | Oshima Airport | Japan | OIM |
| Oshkosh | Wittman Field | USA | OSH |
| Oshkosh | Oshkosh Airport | USA | OKS |
| Osijek | Osijek Airport | Croatia | OSI |
| Oskaloosa | Oskaloosa Municipal Airport | USA | OOA |
| Oskarshamn | Oskarshamn Airport | Sweden | OSK |
| Oslo | Oslo Airport | Norway | OSL |
| Osmanabad | Osmanabad Airport | India | OMN |
| Osorno | Osorno Airport | Chile | ZOS |
| Ostend | Ostend Airport | Belgium | OST |
| Ostersund | Froson Air Force Base | Sweden | OSD |
| Ostrava | Mosnov Airport | Czech Republic | OSR |
| Otjiwarongo | Otjiwarongo Airport | Namibia | OTJ |
| Ottawa | Ottawa Rail Station | Canada | XDS |
| Ottawa | McDonald Cartier Intl. Airport | Canada | YOW |
| Otto | Otto Airport | USA | OTO |
| Ottumwa | Ottumwa Industrial Airport | USA | OTM |
| Otu | Otu Airport | Columbia | OTU |
| Ouadda | Ouadda Airport | Central Africa | ODA |
| Ouaga | Ouaga | Ivory Coast | OUC |
| Ouagadougou | Ouagadougou Airport | Burkina Faso | OUA |
| Ouahigouya | Ouahigouya Airport | Burkina Faso | OUG |
| Ouanda Djalle | Ouanda Djalle Airport | Central Africa | ODJ |
| Ouango-Fitini | Ouango-Fitini Airport | Ivory Coast | OFI |
| Ouargla | Ouargla Airport | Algeria | OGX |
| Ouarzazate | Ouarzazate Airport | Morroco | OZZ |
| Oudomxay | Oudomxay Airport | Laos | ODY |
| Oudtshoorn | Oudtshoorn Airport | South Africa | OUH |
| Ouesso | Ouesso Airport | Congo | OUE |
| Oujda | Oujda Airport | Morroco | OUD |
| Oulu | Oulu Airport | Finland | OUL |
| Ourilandia | Ourilandia Airport | Brazil | OIA |
| Ourinhos | Ourinhos Airport | Brazil | OUS |
| Outer Skerries | Outer Skerries Airport | United Kingdom | OUK |
| Outjo | Outjo | Namibia | OJO |
| Ouvea | Ouloup Airport | New Caledonia | UVE |
| Ouyen | Ouyen Airport | Australia | OYN |
| Ouzinkie | Ouzinkie Airport | USA | KOZ |
| Ovalle | Ovalle Airport | Chile | OVL |
| Ovda | Eilat Intl. Airport | Israel | VDA |
| Owando | Owando Airport | Congo | FTX |
| Owatonna | Owatonna Airport | USA | OWA |
| Owen Sound | Owen Sound Airport | Canada | YOS |
| Owendo | Owendo Airport | Gabon | OWE |
| Owensboro | Daviess County Airport | USA | OWB |
| Oxford | Oxford Airport | United Kingdom | OXF |
| Oxford | Miami University Airport | USA | OXD |
| Oxford | Oxford Airport | USA | OXC |
| Oxford House | Oxford House Airport | Canada | YOH |
| Oxnard | Oxnard/Ventura Airport | USA | OXR |
| Oyem | Oyem Airport | Gabon | OYE |
| Ozamis City | Ozamis Airport | Philippines | OZC |
| Ozona | Ozona Airport | USA | OZA |