| Code Name | City Name | Airport Name | Airport Country |
| OAG | Orange | Springhill | Australia |
| OAJ | Jacksonville | Albert J Ellis | USA, NC |
| OAK | Oakland | Metropolitan Oak International | USA, CA |
| OAL | Cacoal | Cacoal | Brazil |
| OAM | Oamaru | Oamaru | New Zealand |
| OAN | Olanchito | Olanchito | Honduras |
| OAR | Carmel | Fritzsche AAF | USA, CA |
| OAR | Monterey | Fritzsche AAF | USA, CA |
| OAX | Oaxaca | Xoxocotlan | Mexico |
| OBA | Oban | Oban | Australia |
| OBC | Obock | Obock | Djibouti |
| OBD | Obano | Obano | Indonesia |
| OBE | Okeechobee | County | USA, FL |
| OBF | Oberpfaffenhofen | Oberpfaffenhofen | Germany |
| OBI | Obidos | Obidos | Brazil |
| OBK | Northbrook | Sky Harbor | USA, IL |
| OBL | Zoersel | Zoersel | Belgium |
| OBM | Morobe | Morobe | Papua New Guinea |
| OBN | Oban | Connel | United Kingdom |
| OBO | Obihiro | Obihiro | Japan |
| OBS | Aubenas | Vals-Lanas | France |
| OBT | Oakland | Oakland/Coliseum Stat | USA, MD |
| OBU | Kobuk | Kobuk/Wien | USA, AK |
| OBX | Obo | Obo | Papua New Guinea |
| OBY | Ittoqqortoormiit | Ittoqqortoormiit | Greenland |
| OCA | Ocean Reef | Ocean Reef | USA, FL |
| OCC | Coca | Coca | Ecuador |
| OCE | Ocean City | Municipal | USA, MD |
| OCF | Ocala | Taylor Field | USA, FL |
| OCH | Nacogdoches | Lufkin Nacogdoches | USA, TX |
| OCI | Oceanic | Oceanic | USA, AK |
| OCJ | Ocho Rios | Boscobel | Jamaica |
| OCN | Oceanside | Municipal | USA, CA |
| OCV | Ocana | Aguasclaras | Colombia |
| OCW | Washington | Warren Field | USA, NC |
| ODA | Ouadda | Ouadda | Central African Republic |
| ODB | Cordoba | Cordoba | Spain |
| ODD | Oodnadatta | Oodnadatta | Australia |
| ODE | Odense | Beldringe | Denmark |
| ODH | Odiham | RAF Station | United Kingdom |
| ODJ | Ouanda Djalle | Ouanda Djalle | Central African Republic |
| ODL | Cordillo Downs | Cordillo Downs | Australia |
| ODN | Long Seridan | Long Seridan | Malaysia |
| ODR | Ord River | Ord River | Australia |
| ODS | Odessa | Central | Ukraine |
| ODW | Oak Harbor | Oak Harbor | USA, WA |
| ODY | Oudomxay | Oudomxay | Lao PDR |
| OEA | Vincennes | Oneal | USA, IN |
| OEC | Ocussi | Ocussi | Indonesia |
| OEL | Orel | Orel | Russia |
| OEM | Paloemeu | Vincent Fayks | Suriname |
| OEO | Osceola | Municipal | USA, WI |
| OER | Ornskoldsvik | Ornskoldsvik | Sweden |
| OES | San Antonio Oeste | San Antonio Oeste | Argentina |
| OFI | Ouango Fitini | Ouango Fitini | Cote d'Ivoire |
| OFJ | Olafsfjordur | Olafsfjordur | Iceland |
| OFK | Norfolk | Stefan Field | USA, NE |
| OFU | Ofu | Ofu | American Samoa |
| OGA | Ogallala | Searle Field | USA, NE |
| OGB | Orangeburg | Municipal | USA, SC |
| OGD | Ogden | Municipal | USA, UT |
| OGE | Ogeranang | Ogeranang | Papua New Guinea |
| OGG | Kahului | Kahului | USA, HI |
| OGL | Ogle | Ogle | Guyana |
| OGN | Yonaguni Jima | Yonaguni Jima | Japan |
| OGO | Abengourou | Abengourou | Cote d'Ivoire |
| OGR | Bongor | Bongor | Chad |
| OGS | Ogdensburg | Ogdensburg | USA, NY |
| OGV | Ongava Game Reserve | Ongava Game Reserve | Namibia |
| OGX | Ouargla | Ain Beida | Algeria |
| OGZ | Vladikavkaz | Vladikavkaz | Russia |
| OHA | Ohakea | Royal Air Force Base | New Zealand |
| OHC | Northeast Cape | AFS | USA, AK |
| OHD | Ohrid | Ohrid | Macedonia |
| OHI | Oshakati | Oshakati | Namibia |
| OHO | Okhotsk | Okhotsk | Russia |
| OHP | Oban | Heliport | United Kingdom |
| OHR | Wyk auf Foehr | Wyk auf Foehr | Germany |
| OHT | Kohat | Kohat | Pakistan |
| OIA | Ourilandia | Ourilandia | Brazil |
| OIC | Norwich | Eaton | USA, NY |
| OIL | Oil City | Splane Memorial | USA, PA |
| OIM | Oshima | Oshima | Japan |
| OIR | Okushiri | Okushiri | Japan |
| OIT | Oita | Oita | Japan |
| OJC | Kansas City | Johnson Executive | USA, MO |
| OKA | Okinawa | Naha | Japan |
| OKB | Orchid Beach | Fraser Island | Australia |
| OKC | Oklahoma City | Will Rogers World | USA, OK |
| OKD | Sapporo | Okadama | Japan |
| OKE | Okino Erabu | Okino Erabu | Japan |
| OKF | Okaukuejo | Okaukuejo | Namibia |
| OKG | Okoyo | Okoyo | Congo (ROC) |
| OKH | Oakham | Cottesmor RAF | United Kingdom |
| OKI | Oki Island | Oki Island | Japan |
| OKJ | Okayama | Okayama | Japan |
| OKK | Kokomo | Kokomo | USA, IN |
| OKL | Oksibil | Oksibil | Indonesia |
| OKM | Okmulgee | Okmulgee | USA, OK |
| OKN | Okondja | Okondja | Gabon |
| OKO | Tokyo | Yokota AFB | Japan |
| OKP | Oksapmin | Oksapmin | Papua New Guinea |
| OKQ | Okaba | Okaba | Indonesia |
| OKR | Yorke Island | Yorke Island | Australia |
| OKS | Oshkosh | Oshkosh | USA, NE |
| OKT | Oktiabrskij | Oktiabrskij | Russia |
| OKU | Mokuti Lodge | Mokuti Lodge | Namibia |
| OKV | Okao | Okao | Papua New Guinea |
| OKY | Oakey | Oakey | Australia |
| OLA | Orland | Orland | Norway |
| OLB | Olbia | Costa Smeralda | Italy |
| OLD | Old Town | Old Town | USA, ME |
| OLE | Olean | Municipal | USA, NY |
| OLF | Wolf Point | International | USA, MT |
| OLH | Old Harbor | Old Harbor Airport and SPB | USA, AK |
| OLI | Olafsvik | Rif | Iceland |
| OLJ | Olpoi | Olpoi | Vanuatu |
| OLM | Olympia | Olympia | USA, WA |
| OLN | Colonia Sarmiento | Colonia Sarmiento | Argentina |
| OLO | Olomouc | Olomouc | Czech Republic |
| OLP | Olympic Dam | Olympic Dam | Australia |
| OLQ | Olsobip | Olsobip | Papua New Guinea |
| OLS | Nogales | International | USA, AZ |
| OLU | Columbus | Columbus | USA, NE |
| OLV | Olive Branch | Olive Branch Airport | USA, MS |
| OLY | Olney | Olney-Noble | USA, IL |
| OMA | Omaha | Eppley Airfield | USA, NE |
| OMB | Omboue | Omboue | Gabon |
| OMC | Ormoc | Ormoc | Philippines |
| OMD | Oranjemund | Oranjemund | Namibia |
| OME | Nome | Nome | USA, AK |
| OMF | Mafraq | King Hussein | Jordan |
| OMG | Omega | Omega | Namibia |
| OMH | Urmieh | Urmieh | Iran |
| OMJ | Omura | Omura | Japan |
| OMK | Omak | Municipal | USA, WA |
| OML | Omkalai | Omkalai | Papua New Guinea |
| OMM | Marmul | Marmul | Oman |
| OMN | Osmanabad | Osmanabad | India |
| OMO | Mostar | Mostar | Bosnia and Herzegovina |
| OMR | Oradea | Oradea | Romania |
| OMS | Omsk | Omsk | Russia |
| OMY | Oddor Meanche | Oddor Meanche | Cambodia |
| ONA | Winona | Municipal | USA, MN |
| ONB | Ononge | Ononge | Papua New Guinea |
| OND | Ondangwa | Ondangwa | Namibia |
| ONE | Onepusu | Onepusu | Solomon Islands |
| ONG | Mornington | Mornington | Australia |
| ONH | Oneonta | Municipal | USA, NY |
| ONI | Moanamani | Moanamani | Indonesia |
| ONJ | Odate Noshiro | Odate Noshiro | Japan |
| ONL | Oneill | Municipal | USA, NE |
| ONM | Socorro | Socorro | USA, NM |
| ONN | Onion Bay | Onion Bay Lodge SPB | USA, AK |
| ONO | Ontario | Ontario | USA, OR |
| ONP | Newport | Newport | USA, OR |
| ONQ | Zonguldak | Zonguldak | Turkey |
| ONR | Monkira | Monkira | Australia |
| ONS | Onslow | Onslow | Australia |
| ONT | Ontario | International | USA, CA |
| ONU | Ono I Lau | Ono I Lau | Fiji |
| ONX | Colon | Colon | Panama |
| ONY | Olney | Olney | USA, TX |
| OOA | Oskaloosa | Municipal | USA, IA |
| OOK | Toksook Bay | Toksook Bay | USA, AK |
| OOL | Gold Coast | Coolangatta | Australia |
| OOM | Cooma | Cooma | Australia |
| OOR | Mooraberree | Mooraberree | Australia |
| OOT | Onotoa | Onotoa | Kiribati |
| OPA | Kopasker | Kopasker | Iceland |
| OPB | Open Bay | Open Bay | Papua New Guinea |
| OPF | Miami | Opa Locka | USA, FL |
| OPI | Oenpelli | Oenpelli | Australia |
| OPL | Opelousas | St Landry Parish | USA, LA |
| OPO | Porto | Porto | Portugal |
| OPS | Sinop | Sinop | Brazil |
| OPU | Balimo | Balimo | Papua New Guinea |
| OPW | Opuwa | Opuwa | Namibia |
| ORA | Oran | Oran | Argentina |
| ORB | Orebro | Orebro-Bofors | Sweden |
| ORC | Orocue | Orocue | Colombia |
| ORD | Chicago | O'Hare International | USA, IL |
| ORE | Orleans | Orleans | France |
| ORF | Norfolk | International | USA, VA |
| ORG | Paramaribo | Zorg En Hoop | Suriname |
| ORH | Worcester | Worcester | USA, MA |
| ORI | Port Lions | Port Lions SPB | USA, AK |
| ORJ | Orinduik | Orinduik | Guyana |
| ORK | Cork | Cork | Ireland |
| ORL | Orlando | Herndon | USA, FL |
| ORM | Northampton | Northampton | United Kingdom |
| ORN | Oran | Es Senia | Algeria |
| ORO | Yoro | Yoro | Honduras |
| ORP | Orapa | Orapa | Botswana |
| ORQ | Norwalk | Heliport | USA, CT |
| ORR | Yorketown | Yorketown | Australia |
| ORS | Orpheus Island Resort | Waterport | Australia |
| ORT | Northway | Northway Airport | USA, AK |
| ORU | Oruro | Oruro | Bolivia |
| ORV | Noorvik | Curtis Memorial | USA, AK |
| ORW | Ormara | Ormara | Pakistan |
| ORX | Oriximina | Oriximina | Brazil |
| ORY | Paris | Orly | France |
| ORZ | Orange Walk | Orange Walk | Belize |
| OSA | Osaka | Metropolitan Area | Japan |
| OSB | Osage Beach | Osage Beach | USA, MO |
| OSC | Oscoda | Wurtsmith AFB | USA, MI |
| OSD | Ostersund | Froesoe | Sweden |
| OSE | Omora | Omora | Papua New Guinea |
| OSG | Ossima | Ossima | Papua New Guinea |
| OSH | Oshkosh | Wittman Field | USA, WI |
| OSI | Osijek | Osijek | Croatia |
| OSK | Oskarshamn | Oskarshamn | Sweden |
| OSL | Oslo | Oslo Airport | Norway |
| OSM | Mosul | Mosul | Iraq |
| OSN | Osan | Ab | South Korea |
| OSP | Slupsk | Redzikowo | Poland |
| OSR | Ostrava | Mosnov | Czech Republic |
| OSS | Osh | Osh | Kyrgyzstan |
| OST | Ostend | Ostend | Belgium |
| OSU | Columbus | Ohio State University | USA, OH |
| OSW | Orsk | Orsk | Russia |
| OSX | Kosciusko | Attala County | USA, MS |
| OSY | Namsos | Namsos | Norway |
| OSZ | Koszalin | Koszalin | Poland |
| OTA | Mota | Mota | Ethiopia |
| OTC | Bol | Bol | Chad |
| OTD | Contadora | Contadora | Panama |
| OTG | Worthington | Worthington | USA, MN |
| OTH | North Bend | North Bend | USA, OR |
| OTI | Morotai Island | Morotai Island | Indonesia |
| OTJ | Otjiwarongo | Otjiwarongo | Namibia |
| OTL | Boutilimit | Boutilimit | Mauritania |
| OTM | Ottumwa | Industrial | USA, IA |
| OTN | Oaktown | Green | USA, IN |
| OTO | Otto | Vor | USA, NM |
| OTP | Bucharest | Otopeni International | Romania |
| OTR | Coto 47 | Coto 47 | Costa Rica |
| OTS | Anacortes | Anacortes | USA, WA |
| OTU | Otu | Otu | Colombia |
| OTV | Ontong Java | Ontong Java | Solomon Islands |
| OTY | Oria | Oria | Papua New Guinea |
| OTZ | Kotzebue | Kotzebue | USA, AK |
| OUA | Ouagadougou | Ouagadougou | Burkina Faso |
| OUD | Oujda | Les Angades | Morocco |
| OUE | Ouesso | Ouesso | Congo (ROC) |
| OUG | Ouahigouya | Ouahigouya | Burkina Faso |
| OUH | Oudtshoorn | Oudtshoorn | South Africa |
| OUI | Ban Houei | Ban Houei | Lao PDR |
| OUK | Outer Skerries | Outer Skerries | United Kingdom |
| OUL | Oulu | Oulu | Finland |
| OUM | Oum Hadjer | Oum Hadjer | Chad |
| OUN | Norman | Max Westheimer | USA, OK |
| OUR | Batouri | Batouri | Cameroon |
| OUS | Ourinhos | Ourinhos | Brazil |
| OUT | Bousso | Bousso | Chad |
| OUU | Ouanga | Ouanga | Gabon |
| OUZ | Zouerate | Zouerate | Mauritania |
| OVA | Bekily | Bekily | Madagascar |
| OVB | Novosibirsk | Tolmachevo | Russia |
| OVD | Asturias | Oviedo | Spain |
| OVE | Oroville | Oroville | USA, CA |
| OVL | Ovalle | Ovalle | Chile |
| OVR | Olavarria | Olavarria | Argentina |
| OWA | Owatonna | Owatonna | USA, MN |
| OWB | Owensboro | Daviess County | USA, KY |
| OWD | Norwood | Memorial | USA, MA |
| OWE | Owendo | Owendo | Gabon |
| OWK | Norridgewock | Central Maine | USA, ME |
| OXB | Bissau | Osvaldo Vieira | Guinea-Bissau |
| OXC | Oxford | Waterbury-Oxford | USA, CT |
| OXD | Oxford | Miami University | USA, OH |
| OXF | Oxford | Kidlington | United Kingdom |
| OXO | Orientos | Orientos | Australia |
| OXR | Ventura | Oxnard/Ventura Airport | USA, CA |
| OXY | Morney | Morney | Australia |
| OYA | Goya | Goya | Argentina |
| OYE | Oyem | Oyem | Gabon |
| OYG | Moyo | Moyo | Uganda |
| OYK | Oiapoque | Oiapoque | Brazil |
| OYL | Moyale | Moyale | Kenya |
| OYN | Ouyen | Ouyen | Australia |
| OYO | Tres Arroyos | Tres Arroyos | Argentina |
| OYP | St Georges de Loyapock | St-Georges de Loyapock | French Guiana |
| OYS | Yosemite Ntl Park | Yosemite Ntl Park | USA, CA |
| OZA | Ozona | Ozona | USA, TX |
| OZC | Ozamis City | Labo | Philippines |
| OZH | Zaporozhye | Zaporozhye | Ukraine |
| OZP | Morón | Morón Air Base | Spain |
| OZR | Ozark | Cairns AAF | USA, AL |
| OZZ | Ouarzazate | Ouarzazate | Morocco |
Sunday, January 4, 2009
IATA 3-Letter Airport Codes - Starting From 'O'
