| UBJ | RJDC | Ube see Yamaguchi/Ube Airport, Japan |
| UFA | UWUU | Ufa Airport, Russia |
| UHE | LKKU | Uherské Hradiste - Kunovice Airport, Czech Republic |
| ULN | ZMUB | Ulan Bator - Buyant Ukha Airport, Mongolia |
| ULY | UWLW | Ulyanovsk - Vostochny International Airport, Russia |
| UME | ESNU | Umeå Airport, Sweden |
| ZRH | LSZH | Unique Zürich Airport see Zürich - Unique Airport, Switzerland |
| UTN | FAUP | Upington Airport, South Africa |
| | ESCM | Uppsala Airport, Sweden |
| UPN | MMPN | Uruapan - Licenciado Y Gen Ignacio Lopez Rayon Airport, Mexico |
| URC | ZWWW | Urumqi Diwopu International Airport, China PRC |
| UCA | KUCA | Utica - Oneida County Airport, United States |
| UTI | EFUT | Utti Airport see Kouvola-Utti Airport, Finland |
