| 1 | UTR | Aerotrans, Closed Joint-Stock Aircompany | Callsign: Agroaerotrans, Ceased operations. | UA | AVCODES |
| 2 | UTR | Utair South Africa (Pty) Ltd | Callsign: Airut, Ceased operations. | ZA | AVCODES |
| 3 | UTR | Utair Limited | Callsign: Utair Limited, | RUS | AVCODES |
| 4 | UTR | Utair South Africa | | | ICAO1 |
| 5 | UTR | Union Transportation | 1/1975-1/1980 | | NAKINA |
| 6 | UTR | Union Transportation | 1/75-1/80 | | NRHS |
| 7 | UTR | RETIRED 04-26-94 FXD [UNION TRANSPORTATION CO.] | | | PWRC |
| 8 | UTR | Union Transportation | | | RSRV |
| 9 | UTR | | City: Utrecht | NL | TRAFFIC |
| 10 | UTRA | UNITED TRANSPORTATION INC | | | SCAC4 |
| 11 | UTRC | US TRANSFER | | | SCAC4 |
| 12 | UTRD | UNIVERSAL TRANSLOADERS | | | SCAC4 |
| 13 | UTRG | UHLENKAMP TRUCKING | | | SCAC4 |
| 14 | UTRK | UMANA TRUCKING | | | SCAC4 |
| 15 | UTRL | UPON THIS ROCK LLC | | | SCAC4 |
| 16 | UTRN | UNITED TRANSPORTATION SERVICES INC | | | SCAC4 |
| 17 | UTRO | UNITED TRANSPORT | | | SCAC4 |
| 18 | UTRQ | UTRC | | | SCAC4 |
| 19 | UTRS | UNITED TRUCKING SERV. | | | PWRC |
| 20 | UTRS | UNIVERSAL TRANSPORT | | | SCAC4 |
