| Rockville Centre to Sesimbra | 3,361.95 mi (5,410.53 km) |
| Rockville Centre to Setubal | 3,369.88 mi (5,423.29 km) |
| Rockville Centre to Sever do Vouga | 3,334.95 mi (5,367.09 km) |
| Rockville Centre to Silves | 3,431.10 mi (5,521.82 km) |
| Rockville Centre to Sines | 3,387.54 mi (5,451.73 km) |
| Rockville Centre to Sintra | 3,337.72 mi (5,371.54 km) |
| Rockville Centre to Sobrado de Paiva | 3,331.85 mi (5,362.10 km) |
| Rockville Centre to Sobral de Monte Agraco | 3,343.26 mi (5,380.46 km) |
| Rockville Centre to Soure | 3,340.34 mi (5,375.75 km) |
| Rockville Centre to Tabua | 3,361.28 mi (5,409.46 km) |
| Rockville Centre to Tavira | 3,472.39 mi (5,588.27 km) |
| Rockville Centre to Tomar | 3,363.18 mi (5,412.52 km) |
| Rockville Centre to Tondela | 3,354.45 mi (5,398.46 km) |
| Rockville Centre to Torre de Moncorvo | 3,381.92 mi (5,442.68 km) |
| Rockville Centre to Torres Novas | 3,361.16 mi (5,409.27 km) |
