| City | Airports | Airport Iata Code | Country Code |
|---|---|---|---|
| Caracas | Simón Bolívar International Airport | CCS | VE |
| Santa Marta | Simón Bolívar International Airport | SMR | CO |
| Ndola | Simon Mwansa Kapwepwe International Airport | NLA | ZM |
| Sinak | Sinak Airport | NKD | ID |
| Sindal | Sindal Airport | CNL | DK |
| Mirpur Khas | Sindhri Airport | MPD | PK |
| Sines | Sines Airport | SIE | PT |
| Singapore | Singapore Changi Airport | SIN | SG |
| Singaua | Singaua Airport | SGB | PG |
| Mpumalanga/Singita Safari Lodge | Singita Safari Lodge Airport | SSX | ZA |
| Singleton | Singleton Airport | SIX | AU |
| Sinop | Sinop Airport | NOP | TR |
| Sinop | Sinop Airport | OPS | BR |
| Sintang-Borneo Island | Sintang Airport | SQG | ID |
| Siocon | Siocon Airport | XSO | PH |
| Sion | Sion Airport | SIR | CH |
| Sioux Falls | Sioux Falls Regional Airport | FSD | US |
| Sioux City | Sioux Gateway Airport | SUX | US |
| Sioux Lookout | Sioux Lookout Airport | YXL | CA |
| Sipitang | Sipitang Airport | SPT | MY |