| Castleton to Sestu | 1,120.59 mi (1,803.42 km) |
| Castleton to Settimo Torinese | 734.45 mi (1,181.98 km) |
| Castleton to Seveso | 745.18 mi (1,199.26 km) |
| Castleton to Sezze | 1,092.18 mi (1,757.69 km) |
| Castleton to Siano | 1,180.54 mi (1,899.89 km) |
| Castleton to Siena | 938.50 mi (1,510.37 km) |
| Castleton to Signa | 905.79 mi (1,457.73 km) |
| Castleton to Silea | 845.82 mi (1,361.22 km) |
| Castleton to Silvi Paese | 1,066.40 mi (1,716.21 km) |
| Castleton to Sinalunga | 956.15 mi (1,538.77 km) |
| Castleton to Siniscola | 1,055.51 mi (1,698.68 km) |
| Castleton to Sinnai | 1,122.87 mi (1,807.09 km) |
| Castleton to Siracusa | 1,413.95 mi (2,275.53 km) |
| Castleton to Solaro | 745.12 mi (1,199.15 km) |
| Castleton to Soliera | 848.49 mi (1,365.52 km) |
