| Alton to Solofra | 1,037.70 mi (1,670.01 km) |
| Alton to Somma Lombardo | 581.89 mi (936.47 km) |
| Alton to Somma Vesuviana | 1,021.48 mi (1,643.91 km) |
| Alton to Sommacampagna | 672.19 mi (1,081.79 km) |
| Alton to Sona | 670.09 mi (1,078.40 km) |
| Alton to Sondrio | 601.91 mi (968.67 km) |
| Alton to Sora | 949.55 mi (1,528.15 km) |
| Alton to Sorbolo | 683.30 mi (1,099.66 km) |
| Alton to Soresina | 641.43 mi (1,032.28 km) |
| Alton to Sorisole | 613.29 mi (987.00 km) |
| Alton to Sorrento | 1,032.19 mi (1,661.15 km) |
| Alton to Sorso | 848.14 mi (1,364.95 km) |
| Alton to Sortino | 1,244.68 mi (2,003.12 km) |
| Alton to Soverato Marina | 1,209.49 mi (1,946.48 km) |
| Alton to Sovicille | 787.90 mi (1,268.00 km) |
