Airlines
| Airline Name | Country | IATA Code | ICAO | AWB Prefix |
|---|---|---|---|---|
| South Pacific Island Airways | American Samoa | SPI | ||
| Seagreen Air Transport | Antigua And Barbuda | ESA | ||
| Southern Winds | Argentina | A4 | SWD | 242 |
| STAF Airlines | Argentina | FS | STU | 278 |
| Sharp Airlines | Australia | SH | SHA | |
| Skywest Airlines | Australia | XR | OZW | 674 |
| Sunshine Express Airlines | Australia | CQ | EXL | |
| Sunstate Airlines | Australia | QF | SSQ | |
| Styrian Airlines | Austria | Z2 | STY | 536 |
| Silk Way Airlines | Azerbaijan | ZP | AZQ | 463 |
| Skywind Air Company | Azerbaijan | AZH | ||
| Silverfleet | Belgium | |||
| Sobelair | Belgium | Q7 | SLR | 644 |
| Skyjet Brasil | Brazil | SKA | 62 | |
| Skymaster Airlines | Brazil | SKC | ||
| Scorpion Air | Bulgaria | SPN | ||
| Siem Reap Airways International | Cambodia | FT | SRH | |
| SkyLink Aviation | Canada | SKK | ||
| Skyservice | Canada | 5G | SSV | 884 |
| Skyward Aviation | Canada | K9 | SGK | 470 |