| 1 | UTA | Utair Aviation Joint-Stock Company | IATA: UT, Callsign: Tjumavi, IATA Prefix: 298, IATA desigantor changed from P2. ICAO desigantor changed from TMN. Name changed from Tyumenavyatrans Aviation Joint-Stock Company. Name changed from Joint Stock Air Carrier Company Tjumenaviatrans | RUS | AVCODES |
| 2 | UTA | UTair Aviation | IATA: UT | | ICAO1 |
| 3 | UTA | Utah Transport Authority | City: Salt Lake City | USA | TRAFFIC |
| 4 | UTAA | UNDERDOG TRUCKING LLC | | | SCAC4 |
| 5 | UTAH | Utah Ry. Co. | 10/1957-7/2005 | | NAKINA |
| 6 | UTAH | Utah Ry. Co. | 10/57-7/2000 | | NRHS |
| 7 | UTAH | UTAH RAILWAY COMPANY | | | PWRC |
| 8 | UTAH | Utah Railway | | | RSRV |
| 9 | UTAH | Utah Railway Company | | USA | TRAFFIC |
| 10 | UTAI | UTAH TRAILWAYS | | | SCAC4 |
| 11 | UTAR | UNINATIONS CORPORATION | | | SCAC4 |
| 12 | UTAU | {LIMITED LIABILITY COMPANY "UTK HIMALYANS"};ZIPCODE=36008 | | UA | BIC |
| 13 | UTAW | U W FREIGHT LINE, INC | | | SCAC1 |
| 14 | UTAX | United Transportation, Inc. | added 7/1972; 1/1975-1/1980; eliminated 7/1985 | | NAKINA |
| 15 | UTAX | United Transportation, Inc. | 1/75-1/80 | | NRHS |
| 16 | UTAX | *UNITED TRANSPORTATION, INC. | | | PWRC |
| 17 | UTAX | *UTAH TRANSIT AUTHORITY | | | PWRC |
| 18 | UTAX | United Transportation (Utah Transit Authority) | | | RSRV |
