| 1 | SUL | TAM Express S/A | IATA: H9, Callsign: TAM Express, Name changed from Helisul Linhas Aereas S.A. | BR | AVCODES |
| 2 | SUL | Helisul Linhas Aereas S.A. | IATA: PE, IATA designator changed to H9 | BR | AVCODES |
| 3 | SUL | Helisul Linhas Aereas S.A. | IATA: H9, IATA designator changed from PE*. Name changed to TAM Express S/A | BR | AVCODES |
| 4 | SUL | America do Sul Linhas Aereas Ltda | Callsign: Astair, Name chnaged to Asta Linhas Aereas Ltda. | BR | AVCODES |
| 5 | SUL | Asta Linhas Aereas Ltda | IATA: 0A, Suspended operations on 08 April 2021. Name changed from America do Sul Linhas Aereas Ltda. | BR | AVCODES |
| 6 | SULB | SHULLSBURG TRANSPORTATION LLC | | | SCAC4 |
| 7 | SULBUS | Sulbus s.j. Włodzimierz Pasieczyński | | PL | TRAFFIC |
| 8 | SULC | SULCO, Sullivan Consolidation, INC | | | SCAC1 |
| 9 | SULC | SULCO | | | SCAC4 |
| 10 | SULD | SUBTEC LIMITED | | | SCAC4 |
| 11 | SULE | SC UNITED LOGISTICS | | | SCAC4 |
| 12 | SULG | SUDDATH LOGISTICS GROUP INC | | | SCAC4 |
| 13 | SULK | SUPREME LINE TRUCKING | | | SCAC4 |
| 14 | SULM | SIGHTLINES UNLIMITED INC | | | SCAC4 |
| 15 | SULN | SUPERIOR TRUCK LINES | | | SCAC4 |
| 16 | SULR | SUTHERLAND TRANSPORTATION SERVICES | | | SCAC4 |
| 17 | SULT | SUPERIOR LOGISTICS INC | | | SCAC4 |
| 18 | SULU | SHENZHEN UNITED LOGISTICS DEVELOPMENT CO., LTD. | | PRC | BIC |
| 19 | SULV | SULLIVAN TRANSPORTATION INC | | | SCAC4 |
| 20 | SULX | Sultran Ltd. | added 7/1981; 1/1994-7/2005 | | NAKINA |
| 21 | SULX | Sultran Ltd. | added 7/81; 1/94-7/2000 | | NRHS |
| 22 | SULX | SULTRAN LTD. | | | PWRC |
| 23 | SULX | Sultran | | | RSRV |
| 24 | SULX | SULTRAN LTD. | | | SCAC4 |
