| 1 | SUT | Sistemas Aeronauticos 2000, S.A. de C.V. | Callsign: Sistemas, | MEX | AVCODES |
| 2 | SUT | Sultan Air | IATA: KJ, Callsign: Sultan, Ceased operations | TR | AVCODES |
| 3 | SUT | Summit Air Limited | Callsign: Summit, | CDN | AVCODES |
| 4 | SUT | Sistemas Aeronauuticos 2000 | | | ICAO1 |
| 5 | SUTB | SUTTONS INTERNATIONAL NA INC | | | SCAC4 |
| 6 | SUTC | SUMTER TRANSPORT COMPANY INC | | | SCAC4 |
| 7 | SUTD | SUNRISE TRADING INC | | | SCAC4 |
| 8 | SUTE | SUTER COMPANY INC, THE | | | SCAC4 |
| 9 | SUTF | SUPERIOR MAT & COMFORT INC | | | SCAC4 |
| 10 | SUTG | SUNSET TRANSPORT INC | | | SCAC4 |
| 11 | SUTK | SUN TRANSPORTATION, INC | | | SCAC1 |
| 12 | SUTK | SUN TRANSPORTATION INC | | | SCAC4 |
| 13 | SUTO | SUN TRANSPORTATION SYSTEMS | | | SCAC4 |
| 14 | SUTQ | SUPERIOR TRANSPORT | | | SCAC4 |
| 15 | SUTR | SIOUX TRANSPORTATION CO | | | PWRC |
| 16 | SUTR | SOUTHERN CHAMPION TRAY, LP | | | SCAC4 |
| 17 | SUTT | SUTTER MOVING & STORAGE | | | SCAC4 |
| 18 | SUTU | SUTTONS INTERNATIONAL LTD | | GB | BIC |
| 19 | SUTU | SUTTONS INTERNATIONAL | | | PWRC |
| 20 | SUTU | Suttons International | | | RSRV |
| 21 | SUTU | SUTTONS INTERNATIONAL LTD | | | SCAC4 |
| 22 | SUTV | SUPER TRANSPORT, INC | | | SCAC1 |
| 23 | SUTV | SUPER TRANSPORT INC | | | SCAC4 |
| 24 | SUTW | SUMMIT TRANSPORTATION | | | SCAC4 |
| 25 | SUTX | Sumter Transport Co. | added 1/1999; 7/2000; eliminated 7/2005; 7/2005 (not listed) | | NAKINA |
| 26 | SUTX | Sumter Transport Co. | added 1/99; 7/2000 | | NRHS |
| 27 | SUTX | SUMTER TRANSPORT CO. | | | PWRC |
| 28 | SUTX | Sumter Transport | | | RSRV |
| 29 | SUTX | SUMTER TRANSPORT COMPANY INC | | | SCAC4 |
| 30 | SUTY | SCUDDER TAYLOR OIL | | | SCAC4 |
