| Rockville to Sesimbra | 3,575.16 mi (5,753.67 km) |
| Rockville to Setubal | 3,583.20 mi (5,766.61 km) |
| Rockville to Sever do Vouga | 3,549.73 mi (5,712.75 km) |
| Rockville to Silves | 3,643.53 mi (5,863.69 km) |
| Rockville to Sines | 3,600.45 mi (5,794.37 km) |
| Rockville to Sintra | 3,551.12 mi (5,714.98 km) |
| Rockville to Sobrado de Paiva | 3,546.79 mi (5,708.01 km) |
| Rockville to Sobral de Monte Agraco | 3,556.87 mi (5,724.23 km) |
| Rockville to Soure | 3,554.70 mi (5,720.74 km) |
| Rockville to Tabua | 3,575.92 mi (5,754.89 km) |
| Rockville to Tavira | 3,685.00 mi (5,930.43 km) |
| Rockville to Tomar | 3,577.32 mi (5,757.15 km) |
| Rockville to Tondela | 3,569.16 mi (5,744.01 km) |
| Rockville to Torre de Moncorvo | 3,597.10 mi (5,788.97 km) |
| Rockville to Torres Novas | 3,575.20 mi (5,753.73 km) |
