| 1 | ULS | Carroll Air Service, Inc. | Callsign: Ulster, | USA | AVCODES |
| 2 | ULS | Ultra Air S.A.S. | IATA: U0, Callsign: Air Ultra, | CO | AVCODES |
| 3 | ULS | Carroll Air Service | | | ICAO1 |
| 4 | ULS | RETIRED 05-15-92 TP (0806) | | | PWRC |
| 5 | ULSE | ULS EXPRESS INC | | | SCAC4 |
| 6 | ULSH | UNLIMITED FREIGHT INC | | | SCAC4 |
| 7 | ULSQ | USA LOGISTICS SERVICES INC | | | SCAC4 |
| 8 | ULSU | UNITED LOGISTIC SERVICES JSC | | | SCAC4 |
| 9 | ULSV | UNIVERSAL LOGISTICS SERVICES INC | | | SCAC4 |
