| Portimao to Sestu | 967.03 mi (1,556.28 km) |
| Portimao to Settimo Torinese | 1,009.57 mi (1,624.74 km) |
| Portimao to Seveso | 1,084.83 mi (1,745.86 km) |
| Portimao to Sezze | 1,190.06 mi (1,915.21 km) |
| Portimao to Siano | 1,269.50 mi (2,043.07 km) |
| Portimao to Siena | 1,128.31 mi (1,815.83 km) |
| Portimao to Signa | 1,126.27 mi (1,812.56 km) |
| Portimao to Silea | 1,224.63 mi (1,970.86 km) |
| Portimao to Silvi Paese | 1,254.27 mi (2,018.56 km) |
| Portimao to Sinalunga | 1,146.01 mi (1,844.32 km) |
| Portimao to Siniscola | 1,007.43 mi (1,621.31 km) |
| Portimao to Sinnai | 972.98 mi (1,565.86 km) |
| Portimao to Siracusa | 1,309.46 mi (2,107.38 km) |
| Portimao to Solaro | 1,081.64 mi (1,740.73 km) |
| Portimao to Soliera | 1,139.55 mi (1,833.93 km) |
