Enter city, state, or port code.
Name / Location   | State  | Airport Code | Port Code |
| 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 | Missouri | SGF | 4505 |
| Springfield | Massachusetts | CEF | 0402 |
| 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 |
| Tucson | Arizona | TUS | 2609 |
