Enter city, state, or port code.
| Name / Location | State   | Airport Code | Port Code | Zip Code |
| Sarasota-Bradenton Airport | Florida | SRQ | 1883 | |
| Sasabe | Arizona | 2606 | ||
| Saulte St Marie | Michigan | CIU | 3803 | |
| Savannah | Georgia | SAV | 1703 | |
| Seattle / Point Wells | Washington | SEA | 3001 | |
| Seattle-Tacoma International Airport | Washington | SEA | 3029 | |
| Selby | California | 2827 | ||
| Shreveport-Bossier City | Louisiana | SHV | 2018 | |
| Sitka | Alaska | SIT | 3115 | |
| Skagway | Alaska | SGY | 3103 | |
| Spokane | Washington | GEG | 3022 | |
| Springfield | Massachusetts | CEF | 0402 | |
| Springfield | Missouri | SGF | 4505 | |
| St Joseph | Missouri | 4502 | ||
| St Louis | Missouri | STL | 4503 | |
| St Paul Airport Achorage | Alaska | ANC | 3181 | |
| St Petersburg | Florida | PIE | 1814 | |
| St Rose | Louisiana | 2013 | ||
| Stockton | California | SCK | 2810 | |
| Syracuse | New York | SYR | 0906 | |
| Tacoma | Washington | TAC | 3002 | |
| Tampa | Florida | TPA | 1801 | |
| Tecate | California | 2505 | ||
| Theodore | Alabama | 1901 | ||
| Toledo | Ohio | TOL | 4105 | |
