| Portalegre to Solofra | 1,178.71 mi (1,896.95 km) |
| Portalegre to Somma Lombardo | 929.01 mi (1,495.10 km) |
| Portalegre to Somma Vesuviana | 1,157.04 mi (1,862.08 km) |
| Portalegre to Sommacampagna | 1,019.92 mi (1,641.41 km) |
| Portalegre to Sona | 1,019.86 mi (1,641.31 km) |
| Portalegre to Sondrio | 993.81 mi (1,599.38 km) |
| Portalegre to Sora | 1,114.31 mi (1,793.31 km) |
| Portalegre to Sorbolo | 989.94 mi (1,593.15 km) |
| Portalegre to Soresina | 971.70 mi (1,563.80 km) |
| Portalegre to Sorisole | 973.25 mi (1,566.29 km) |
| Portalegre to Sorrento | 1,154.39 mi (1,857.81 km) |
| Portalegre to Sorso | 850.79 mi (1,369.21 km) |
| Portalegre to Sortino | 1,224.11 mi (1,970.01 km) |
| Portalegre to Soverato Marina | 1,283.88 mi (2,066.21 km) |
| Portalegre to Sovicille | 1,003.70 mi (1,615.30 km) |
