| 1 | SYL | Sayany Airlines | IATA: Y8, Callsign: Sayany, | RUS | AVCODES |
| 2 | SYL | JSC Airline Yakutia | IATA: R3, Callsign: Air Yakutia, Designator Y8* recalled by IATA | RUS | AVCODES |
| 3 | SYL | Aircompany Yakutia | IATA: R3 | | ICAO1 |
| 4 | SYLA | SKY LINE TRANSPORTATION INC | | | SCAC4 |
| 5 | SYLB | SCHUYLER, K R INC | | | SCAC4 |
| 6 | SYLD | SENTRY LOGISTICS GROUP INC | | | SCAC4 |
| 7 | SYLE | SANCHEZ LERMA, YOLANDA LETICIA & AR | | | SCAC4 |
| 8 | SYLJ | SYNERGY LOGISTICS INC | | | SCAC4 |
| 9 | SYLK | SKYLINE TRUCKING SERVICES LLC | | | SCAC4 |
| 10 | SYLL | SHINYO LOYALTY LIMITED | | | SCAC4 |
| 11 | SYLO | SAYLE OIL COMPANY INC | | | SCAC4 |
| 12 | SYLR | SYLSY TRUCKING INC | | | SCAC4 |
| 13 | SYLS | STYLE LIMOUSINES | | | SCAC4 |
| 14 | SYLT | SKYLIFT SERVICES INC | | | SCAC4 |
| 15 | SYLT | Sylter Inselbahn | | D | TRAFFIC |
| 16 | SYLX | Sylvania Industrial Corp. | 7/1932-1/1946 | | NAKINA |
| 17 | SYLX | American Viscose Corp., Sylvania Division | 4/1947-7/1954; eliminated 1/1956 | | NAKINA |
| 18 | SYLX | Sylvania Industrial Corp. | Apr-38 | | NRHS |
| 19 | SYLX | American Viscose Corp., Sylvania Division | Jan-52 | | NRHS |
| 20 | SYLX | AMERICAN VISCOSE CORP., SYLVANIA DIVISION | | | PWRC |
