| IATA |
ICAO |
Airline
| Country
| Callsign |
| |
| U2 |
UFS |
UFS, Inc. |
United States |
Feeder Flight |
| QU |
UGA |
Uganda Airlines Corp. |
Uganda |
Uganda |
| PS |
AUI |
Ukraine International Airlines |
Ukraine |
Ukraine International |
| UF |
|
Ukrainian Mediterranean Airlines |
Ukraine |
|
| B7 |
UIA |
UNI Airways Corporation |
Taiwan |
|
| UA |
UAL |
United Airlines, Inc. |
United States |
United |
| 5X |
UPS |
United Parcel Service Company (UPS) |
United States |
UPS |
| UV |
UVA |
Universal Airways Inc. |
United States |
Universal |
| U6 |
SVR |
Ural Airlines |
Russian Federation |
Sverdlovsk Air |
| US |
USA |
US Airways, Inc. |
United States |
US Air |
| U7 |
JUS |
USA Jet Airlines, Inc. |
United States |
Jet USA |
| HY |
UZB |
Uzbekistan Havo Yullary - Uzbekistan Airways |
Uzbekistan |
Uzbek |
| |
|
