| UAK |
Narssarssuaq Airport |
| UAQ |
San Juan
Airport |
| UCA |
Utica - Oneida County Airport |
| UET |
Quetta Airport |
| UHE |
Uherské Hradiste - Kunovice Airport |
| UIO |
Quito - Mariscal Sucre Airport |
| UIP |
Quimper - Pluguffan Airport |
| ULC |
Santiago
- Los Cerillos Airport |
| ULN |
Ulan Bator - Buyant Ukha Airport |
| ULY |
Ulyanovsk
- Vostochny International Airport |
| UME |
Umeå Airport |
| UND |
Kunduz Airport |
| UPN |
Uruapan - Licenciado Y Gen Ignacio Lopez Rayon Airport |
| URC |
Urumqi - Diwopu Airport |
| URE |
Kuressaare Airport |
| URS |
Kursk Airport |
| USA |
San Luis
Airport |
| UTN |
Upington Airport |
| UUS |
Yuzhno-Sakhalinsk Airport |
| UVF |
Saint Lucia - Hewanorra International Airport |