Directory of Airlines
- S7 Airlines
- Safi Airways
- Saint Barth Commuter
- Samara Airlines
- Samoa Air
- Sansa Airlines
- SAS Scandinavian Airlines
- SATA International
- SAT Airlines
- SATENA
- Saudi Arabian Airlines
- SBA Airlines
- Scoot
- Seaborne Airlines
- Seair Seaplanes
- Sempati Air
- Senegal Airlines
- SETE Linhas Aereas
- Severstal Air Company
- Shaheen Air International
- Shandong Airlines
- Shanghai Airlines
- Sharp Airlines
- Shenzhen Airlines
- Shorouk Air
- Sibaviatrans
- Sichuan Airlines
- SilkAir
- Silver Airways
- Singapore Airlines
- Sky Airline
- Sky Aviation
- SkyBahamas Airlines
- Skybus Airlines
- SkyEurope
- Skymark Airlines
- Sky Pasada
- Sky Shuttle Helicopters
- Skystar Airways
- Skytrans Airlines
- Skyward Aviation
- SkyWork Airlines
- SmartWings
- Solaseed Air
- Sol Linhas Aereas
- Solomon Airlines
- Sounds Air
- South African Airways
- South African Express
- Southeast Airlines
- Southern Air Charter
- Southern Winds Airlines
- Southwest Airlines
- Spanair
- SpiceJet
- Spirit Airlines
- Spirit of Manila Airlines
- Spring Airlines
- SriLankan Airlines
- Sriwijaya Air
- Starbow Airlines
- STA Trans African Airlines
- Sterling Airlines
- STP Airways
- Styrian Spirit
- Sudan Airways
- Sunair
- Sun Air of Scandinavia
- Sun Country Airlines
- SunExpress
- Sunshine Express Airlines
- Sunwing Airlines
- Surinam Airways
- Sverigeflyg
- SVG Air
- Swazi Express Airways
- Swaziland Airlink
- Swedline Express
- Swiss International Air Lines
- Syrian Arab Airlines