| Seia to Sestu | 892.72 mi (1,436.69 km) |
| Seia to Settimo Torinese | 847.61 mi (1,364.09 km) |
| Seia to Seveso | 921.54 mi (1,483.08 km) |
| Seia to Sezze | 1,083.60 mi (1,743.88 km) |
| Seia to Siano | 1,171.83 mi (1,885.87 km) |
| Seia to Siena | 997.22 mi (1,604.87 km) |
| Seia to Signa | 989.10 mi (1,591.79 km) |
| Seia to Silea | 1,069.26 mi (1,720.81 km) |
| Seia to Silvi Paese | 1,135.66 mi (1,827.67 km) |
| Seia to Sinalunga | 1,016.80 mi (1,636.38 km) |
| Seia to Siniscola | 912.71 mi (1,468.86 km) |
| Seia to Sinnai | 898.53 mi (1,446.05 km) |
| Seia to Siracusa | 1,256.61 mi (2,022.33 km) |
| Seia to Solaro | 918.50 mi (1,478.18 km) |
| Seia to Soliera | 990.88 mi (1,594.67 km) |
