| Alton to Sestu | 952.21 mi (1,532.44 km) |
| Alton to Settimo Torinese | 578.30 mi (930.69 km) |
| Alton to Seveso | 599.11 mi (964.18 km) |
| Alton to Sezze | 942.23 mi (1,516.37 km) |
| Alton to Siano | 1,033.94 mi (1,663.97 km) |
| Alton to Siena | 789.43 mi (1,270.46 km) |
| Alton to Signa | 758.03 mi (1,219.94 km) |
| Alton to Silea | 715.95 mi (1,152.21 km) |
| Alton to Silvi Paese | 925.19 mi (1,488.94 km) |
| Alton to Sinalunga | 808.30 mi (1,300.83 km) |
| Alton to Siniscola | 891.13 mi (1,434.14 km) |
| Alton to Sinnai | 954.77 mi (1,536.55 km) |
| Alton to Siracusa | 1,258.11 mi (2,024.74 km) |
| Alton to Solaro | 598.57 mi (963.31 km) |
| Alton to Soliera | 705.39 mi (1,135.22 km) |
