| Sierre to Sesimbra | 1,004.61 mi (1,616.76 km) |
| Sierre to Setubal | 992.36 mi (1,597.05 km) |
| Sierre to Sever do Vouga | 882.51 mi (1,420.26 km) |
| Sierre to Silves | 1,033.28 mi (1,662.90 km) |
| Sierre to Sines | 1,015.89 mi (1,634.92 km) |
| Sierre to Sintra | 1,002.12 mi (1,612.75 km) |
| Sierre to Sobrado de Paiva | 867.46 mi (1,396.04 km) |
| Sierre to Sobral de Monte Agraco | 982.92 mi (1,581.86 km) |
| Sierre to Soure | 919.55 mi (1,479.88 km) |
| Sierre to Tabua | 881.14 mi (1,418.06 km) |
| Sierre to Tavira | 1,004.94 mi (1,617.30 km) |
| Sierre to Tomar | 927.54 mi (1,492.73 km) |
| Sierre to Tondela | 877.72 mi (1,412.56 km) |
| Sierre to Torre de Moncorvo | 810.73 mi (1,304.75 km) |
| Sierre to Torres Novas | 937.93 mi (1,509.46 km) |
