| | IATA | ICAO | City | Region | State | Country | | SIN | | Singapore | | | Singapore |
| SIP | | Simferopol | | | Ukraine |
| SIT | | Sitka | | ALASKA | USA |
| SJC | | San Jose | | CALIFORNIA | USA |
| SJD | | San Jose del Cabo | | Baja California Sur | Mexico |
| SJI | | San Jose | | | Philippines |
| SJJ | | Sarajevo | | | Bosnia and Herzegowina... |
| SJO | | San Jose | | Jose | Costa Rica |
| SJT | | San Angelo | | TEXAS | USA |
| SJU | | San Juan | | PUERTO RICO | USA |
| SJW | | Shijiazhuang | | | China |
| SKB | | St Kitts | | | Saint Kitts and Nevis... |
| SKD | | Samarkand | | | Uzbekistan |
| SKP | | Skopje | | | Macedonia |
| SLA | | Salta | | Salta | Argentina |
| SLC | | Salt Lake City | | UTAH | USA |
| SLK | | Saranac Lake | | NEW YORK | USA |
| SLN | | Salina | | KANSAS | USA |
| SLP | | San Luis | | Potosi | Mexico |
| SLU | | St Lucia | | | St Lucia |
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