| 城市名称 | 机场三字代码 | 机场四字代码 | 机场名称 | 英文名称 |
| NYAUNG-U | NYU | NYAUNG-U | ||
| JACKSONVILLE | NZC | JACKSONVILLECECILFIE | ||
| 恩泽雷科雷 | NZE | NZEREKORE | ||
| NZOIA | NZO | NZOIA | ||
| SOUTHWEYMOUT | NZW | SOUTHWEYMOUTH | ||
| SANDIEGONORT | NZY | SANDIEGONORTHISLANDN | ||
| ORANGESPRING | OAG | ORANGESPRINGHILL | ||
| 奥克兰 | OAK | OAKLAND | ||
| OAMARU | OAM | OAMARU | ||
| OLANCHITO | OAN | OLANCHITO | ||
| MONTEREYFRIT | OAR | MONTEREYFRITZSCHEAAF | ||
| 瓦哈卡 | OAX | OAXACA | ||
| OBAN | OBA | OBAN | ||
| OBOCK | OBC | OBOCK | ||
| OBANO | OBD | OBANO | ||
| OKEECHOBEECO | OBE | OKEECHOBEECOUNTY | ||
| OBERPFAFFENH | OBF | OBERPFAFFENHO | ||
| OBIDOS | OBI | OBIDOS | ||
| NORTHBROOKSK | OBK | NORTHBROOKSKYHARBOR | ||
| 莫雷贝 | OBM | MOROBE | ||
| OBANCONNEL | OBN | OBANCONNEL | ||
| OBIHIRO | OBO | OBIHIRO | ||
| AUBENASVALSL | OBS | AUBENASVALSLANAS | ||
| KOBUK | OBU | KOBUK | ||
| 奥博 | OBX | OBO | ||
| SCORESBYSUND | OBY | SCORESBYSUND | ||
| OCEANREEFCLU | OCA | OCEANREEFCLUB | ||
| COCA | OCC | COCA | ||
| OCEANCITY | OCE | OCEANCITY | ||
| OCALA | OCF | OCALA | ||
| NACOGDOCHES | OCH | NACOGDOCHES | ||
| OCEANIC | OCI | OCEANIC | ||
| OCHORIOSBOSC | OCJ | OCHORIOSBOSCOBEL | ||
| OCEANSIDE | OCN | OCEANSIDE | ||
| OCANA | OCV | OCANA | ||
| OUADDA | ODA | OUADDA | ||
| 科尔多瓦 | ODB | CORDOBA | ||
| OODNADATTA | ODD | OODNADATTA | ||
| ODENSE | ODE | ODENSE | ||
| OUANDADJALLE | ODJ | OUANDADJALLE | ||
| CORDILLODOWN | ODL | CORDILLODOWNS | ||
| 奥克兰 | ODM | OAKLAND | ||
| LONGSERIDAN | ODN | LONGSERIDAN | ||
| ORDRIVER | ODR | ORDRIVER | ||
| 敖德萨 | ODS | ODESSA | ||
| OAKHARBOR | ODW | OAKHARBOR | ||
| OUDOMXAY | ODY | OUDOMXAY | ||
| VINCENNESONE | OEA | VINCENNESONEAL | ||
| OCUSSIHUMBER | OEC | OCUSSIHUMBERTE | ||
| 奥廖尔 | OEL | OREL | ||
| PALOEMEUV.FA | OEM | PALOEMEUV.FAYKS | ||
| OSCEOLAMUNIC | OEO | OSCEOLAMUNICIPAL | ||
| ORNSKOLDSVIK | OER | ORNSKOLDSVIK | ||
| SANANTONIOOE | OES | SANANTONIOOESTE | ||
| OMAHAOFFUTTA | OFF | OMAHAOFFUTTAFB | ||
| OUANGOFITINI | OFI | OUANGOFITINI | ||
| OLAFSFJORDUR | OFJ | OLAFSFJORDUR | ||
| 诺福克 | OFK | NORFOLK | ||
| OFUISLANDAIR | OFU | OFUISLANDAIRFIELD | ||
| OGALLALA | OGA | OGALLALA |
机场三字代码简称“三字代码”，由国际航空运输协会（IATA ,International Air Transport Association）制定。国际航空运输协会（IATA）对世界上的国家、城市、机场、加入国际航空运输协会的航空公司制定了统一的编码。在空运中以三个英文字母简写航空机场名，称“机场三字代码”或“三字代码”。
世界上每一个民航机场都有自己唯一的三字码，部分空军机场也有三字码。机场三字代码查询支持国际机场三字代码查询，国内机场3字代码查询，全球机场三字代码查询，国内机场三字代码，始发机场三字代码，机场三字代码表，国际机场三字代码表查询。