| 1 | SLF | Skyline Flights GmbH | Callsign: Skyship, | D | AVCODES |
| 2 | SLF | StarFly Helicopters | | I | AVCODES |
| 3 | SLF | Silver Bird Charterflug GmbH | Callsign: Silver Fox, | D | AVCODES |
| 4 | SLF | Starfly | | | ICAO1 |
| 5 | SLFB | SL EXPRESS | | | SCAC4 |
| 6 | SLFD | SHINN LOGISTICS LLC | | | SCAC4 |
| 7 | SLFF | STAR ALFALFA INC | | | SCAC4 |
| 8 | SLFG | SOLIS FREIGHT | | | SCAC4 |
| 9 | SLFI | SEALIFT INC | | | SCAC4 |
| 10 | SLFJ | SMT LOGISTICS | | | SCAC4 |
| 11 | SLFM | SCHELL FARMS LTD | | | SCAC4 |
| 12 | SLFN | SEA LAND ENERGY OF MAINE | | | SCAC4 |
| 13 | SLFP | SUMMIT LIFT COMPANY LTD | | | SCAC4 |
| 14 | SLFQ | SMALL FARMS LLC | | | SCAC4 |
| 15 | SLFR | SHOWA LINE, LTD. | | | PWRC |
| 16 | SLFR | SEA-LAND MOTOR FREIGHT, INC | | | SCAC1 |
| 17 | SLFS | St. Louis-San Francisco Ry. Co. | 8/1920 | | NAKINA |
| 18 | SLFS | ST. LOUIS-SAN FRANCISCO RWY. CO. | | | PWRC |
| 19 | SLFS | SEA LION OCEAN FREIGHT | | | SCAC4 |
| 20 | SLFT | SEALIFT NV | | | SCAC4 |
| 21 | SLFU | SUNLIT FLUO & CHEMICAL CO., LTD. | | RC | BIC |
| 22 | SLFU | SHOWA LINE, LTD. | | | PWRC |
| 23 | SLFU | Showa Line Limited | | | RSRV |
| 24 | SLFV | SAN LUIS INTERNATIONAL FREIGHT SERV | | | SCAC4 |
| 25 | SLFY | SHUR-LOC FABRIC SYSTEM | | | SCAC4 |
