- Sir Charles Gaetan Duval AirportIdent: FIMRCountry: Mauritius
- Siri AirportIdent: OIBSCountry: Iran
- Sirjan AirportIdent: OIKYCountry: Iran
- Sirsa Air Force StationIdent: VISACountry: India
- Sishen AirportIdent: FASSCountry: South Africa
- Sisimiut AirportIdent: BGSSCountry: Greenland
- Sitalchay AirbaseIdent: AZ-0013Country: Azerbaijan
- Sitia AirportIdent: LGSTCountry: Greece
- Sitka Rocky Gutierrez AirportIdent: PASICountry: United States
- Sittwe AirportIdent: VYSWCountry: Myanmar (Burma)
- Sivas Nuri Demirağ AirportIdent: LTARCountry: Türkiye
- Sivrihisar AirportIdent: LTAVCountry: Türkiye
- Skellefteå AirportIdent: ESNSCountry: Sweden
- Skiathos Island National AirportIdent: LGSKCountry: Greece
- Skien AirportIdent: ENSNCountry: Norway
- Skive AirportIdent: EKSVCountry: Denmark
- Skrydstrup Air BaseIdent: EKSPCountry: Denmark
- Skukuza AirportIdent: FASZCountry: South Africa
- Skövde AirportIdent: ESGRCountry: Sweden
- Slave Lake AirportIdent: CYZHCountry: Canada
- Sliač AirportIdent: LZSLCountry: Slovakia
- Sligo AirportIdent: EISGCountry: Ireland
- Smara AirportIdent: GMMACountry: Western Sahara
- Smith Reynolds AirportIdent: KINTCountry: United States
- Smithers AirportIdent: CYYDCountry: Canada
- Smiths Falls-Montague (Russ Beach) AirportIdent: CYSHCountry: Canada
- Smithton AirportIdent: YSMICountry: Australia
- Smolensk North AirportIdent: RU-10076Country: Russia
- Smuravyovo Air BaseIdent: RU-5376Country: Russia
- Smyrna AirportIdent: KMQYCountry: United States
- Snake Bay AirportIdent: YSNBCountry: Australia
- Socotra AirportIdent: OYSQCountry: Yemen
- Sodankyla AirportIdent: EFSOCountry: Finland
- Soewondo Air Force BaseIdent: WIMKCountry: Indonesia
- Sokol AirportIdent: UHMMCountry: Russia
- Solapur AirportIdent: VASLCountry: India
- Soldotna AirportIdent: PASXCountry: United States
- Solenzara (BA 126) Air BaseIdent: LFKSCountry: France
- Soltsy-2 Air BaseIdent: RU-10049Country: Russia
- Sonari AirportIdent: VEJSCountry: India
- Sondok AirportIdent: ZKSDCountry: North Korea
- Songkhla AirportIdent: VTSHCountry: Thailand
- Songwe AirportIdent: HTGWCountry: Tanzania
- Songyuan Chaganhu AirportIdent: ZYSQCountry: China
- Sonora Municipal AirportIdent: KSOACountry: United States
- Sormovo AirfieldIdent: RU-0217Country: Russia
- Soroti AirportIdent: HUSOCountry: Uganda
- South Alabama Regional At Bill Benton Field AirportIdent: K79JCountry: United States
- South Arkansas Regional Airport at Goodwin FieldIdent: KELDCountry: United States
- South Bend International AirportIdent: KSBNCountry: United States
- South Bimini AirportIdent: MYBSCountry: Bahamas
- South Caicos AirportIdent: MBSCCountry: Turks & Caicos Islands
- South Valley Regional AirportIdent: KU42Country: United States
- Southampton AirportIdent: EGHICountry: United Kingdom
- Southdowns AirportIdent: FLSOCountry: Zambia
- Southeast Colorado Regional AirportIdent: KLAACountry: United States
- Southeast Iowa Regional AirportIdent: KBRLCountry: United States
- Southern Illinois AirportIdent: KMDHCountry: United States
- Southwest Georgia Regional AirportIdent: KABYCountry: United States
- Southwest Oregon Regional AirportIdent: KOTHCountry: United States