Airlines — S
- TIHS C Ion Tiriac
- RLSS-Air
- SFXS.K. Logistics
- GDGS.P. Aviation
- SBIS7 Airlines
- REJSA Airlink Regional
- TGTSAAB Nyge Aero
- SCTSAAB-Aircraft
- MMSSAAD (A320) Limited
- SAXSabah Air
- SMCSabang Merauke Raya Air Charter
- SISSaber Airlines
- SBRSaber Aviation
- SBGSabre Incorporated
- SDKSADELCA - Sociedad Aerea Del Caqueta
- SSSSAESA
- SETSAETA
- SFRSafair
- SXYSafari Express Cargo
- XLKSafarilink Aviation
- IRVSafat Airlines
- SFPSafe Air
- SFFSafewings Aviation Company
- SFNSafiran Airlines
- SGXSaga Airlines
- SGPSagolair Transportes Ejecutivos
- IRZSaha Airlines Services
- SHDSahara Airlines
- AWJSahel Airlines
- SAOSahel Aviation Service
- SBUSaint Barth Commuter
- SRASair Aviation
- AZGSakaviaservice
- SHUSakhalinskie Aviatrassy (SAT)
- SIRSalair
- SLWSalama Airlines Nigeria
- KKSSalem
- SLPSalpa Aviation
- SLCSalsa d\\'Haiti
- SAMSAM Colombia
- SMYSama Airlines
- SAVSamal Air
- SMQSamar Air
- BRZSamara Airlines
- HLOSamaritan Air Service
- UZSSamarkand Airways
- SGUSamgau
- SHLSamson Aviation
- 770Samurai Airlines
- SDISan Dima Air
- MRRSan Juan Airlines
- LRSSANSA
- BBRSanta Barbara Airlines
- SPPSapphire Aviation
- SPHSapphire Executive Air
- SOVSaratov Aviation Division
- SRWSarit Airlines
- JIMSark International Airways
- CNOSAS Braathens
- SSBSasair
- SSUSASCA
- SACSASCO Airlines
- SLGSaskatchewan Government
- SGSSaskatchewan Government Executive Air Service
- SOZSat Airlines
- SATSATA Air Acores
- RZOSATA International
- SXXSatellite Aero
- NSESATENA
- SYKSatsair
- SVASaudi Arabian Airlines
- SNISavanah Airlines
- SVNSavanair (Angola)
- SAHSayakhat Airlines
- SASScandinavian Airlines System
- VSVScat Air
- ENRScenic Air
- SCEScenic Airlines
- SBZScibe Airlift
- RFTScoala Superioara De Aviatie Civila
- SCOScoot
- SCPScorpio
- SAYScotAirways
- SKOScottish Airways Flyers
- SBSSeaborne Airlines
- SCCSeacoast Airlines
- CGLSeagle Air
- SQHSeaPort Airlines
- SRCSearca
- SRGSearch and Rescue 202
- SRDSearch and Rescue 22
- GIKSeba Airlines
- SIJSeco International
- UKUSecond Sverdlovsk Air Enterprise
- ANXSecretaria de Marina
- XTRSector Airlines
- JCMSecure Air Charter
- SVXSecurity Aviation
- STGSedalia
- SEDSedona Air Center