| Cascais to Sestu | 992.96 mi (1,598.01 km) |
| Cascais to Settimo Torinese | 986.23 mi (1,587.19 km) |
| Cascais to Seveso | 1,060.88 mi (1,707.32 km) |
| Cascais to Sezze | 1,200.40 mi (1,931.86 km) |
| Cascais to Siano | 1,284.92 mi (2,067.87 km) |
| Cascais to Siena | 1,124.47 mi (1,809.66 km) |
| Cascais to Signa | 1,118.83 mi (1,800.58 km) |
| Cascais to Silea | 1,206.24 mi (1,941.26 km) |
| Cascais to Silvi Paese | 1,258.10 mi (2,024.72 km) |
| Cascais to Sinalunga | 1,143.34 mi (1,840.03 km) |
| Cascais to Siniscola | 1,023.14 mi (1,646.58 km) |
| Cascais to Sinnai | 998.88 mi (1,607.55 km) |
| Cascais to Siracusa | 1,347.78 mi (2,169.04 km) |
| Cascais to Solaro | 1,057.77 mi (1,702.32 km) |
| Cascais to Soliera | 1,125.14 mi (1,810.74 km) |
