| Airline Name |
ICAO |
IATA |
Callsign |
Country |
| U-Land Airlines |
|
|
|
Taiwan |
| Uair |
|
UE |
|
Uruguay |
| Uganda Airlines |
UGA |
QU |
|
Uganda |
| UK International Airlines |
UKI |
|
KHALIQ |
United Kingdom |
| Ukraine International Airlines |
AUI |
PS |
|
Ukraine |
| Ukrainian Government |
|
|
|
Ukraine |
| Ultimate Jetcharters |
|
|
|
United States |
| UM Air – Ukrainian-Mediterranean Airlines |
UKM |
UF |
|
Ukraine |
| Unex – Universal Express Linhas Aereas |
UNX |
|
|
Brazil |
| UNI Airways |
UIA |
B7 |
|
Taiwan |
| Uni-Top Airlines |
|
UW |
|
China |
| Unibanco |
|
|
|
Brazil |
| Unifly |
UFL |
|
|
Equatorial Guinea |
| Unifly Express |
|
IP |
|
Italy |
| United Airlines |
UAL |
UA |
UNITED |
United States |
| United Airways |
|
4H |
|
Bangladesh |
| United Arab Emirates Air Force |
UAF |
|
|
United Arab Emirates |
| United Arab Emirates Government |
|
|
|
United Arab Emirates |
| United Aviation |
|
|
|
United States |
| United Eagle Airlines |
UEA |
EU |
UNITED EAGLE |
China |
| United Express |
BLR |
DH |
|
United States |
| United Feeder Service (United Express) |
UFS |
U2 |
FEEDER-FLIGHT |
United States |
| United Nations |
UNO |
|
|
Unknown |
| United Parcel Service (UPS) |
UPS |
5X |
|
United States |
| Universair |
UNA |
UN |
|
Spain |
| Universal Airlines |
UVG |
UW |
GUYANA JET |
Guyana |
| Universal Airlines |
|
|
|
Spain |
| Ural Airlines |
SVR |
U6 |
SVERDLOVSK AIR |
Russian Federation |
| US Airways |
AWE |
US |
CACTUS |
United States |
| US Navy |
|
|
|
United States |
| USA 3000 |
GWY |
U5 |
|
United States |
| USA Jet Airlines |
JUS |
U7 |
|
United States |
| USAfrica Airways |
USF |
|
|
United States |
| USAir |
USA |
US |
US AIR |
United States |
| USAL Ltd. |
|
|
|
United States |
| UTA |
UTA |
UT |
UTA |
France |
| UTAir Aviation |
TMN |
P2 |
TYUMAVI |
Russian Federation |
| Uzbekistan Airways |
UZB |
HY |
|
Uzbekistan |
