| Caister-on-Sea to Solofra | 1,022.51 mi (1,645.57 km) |
| Caister-on-Sea to Somma Lombardo | 574.59 mi (924.71 km) |
| Caister-on-Sea to Somma Vesuviana | 1,008.69 mi (1,623.33 km) |
| Caister-on-Sea to Sommacampagna | 648.28 mi (1,043.31 km) |
| Caister-on-Sea to Sona | 645.95 mi (1,039.55 km) |
| Caister-on-Sea to Sondrio | 577.48 mi (929.37 km) |
| Caister-on-Sea to Sora | 936.65 mi (1,507.40 km) |
| Caister-on-Sea to Sorbolo | 668.64 mi (1,076.08 km) |
| Caister-on-Sea to Soresina | 627.41 mi (1,009.71 km) |
| Caister-on-Sea to Sorisole | 596.04 mi (959.24 km) |
| Caister-on-Sea to Sorrento | 1,021.34 mi (1,643.69 km) |
| Caister-on-Sea to Sorso | 879.79 mi (1,415.89 km) |
| Caister-on-Sea to Sortino | 1,247.77 mi (2,008.09 km) |
| Caister-on-Sea to Soverato Marina | 1,196.33 mi (1,925.31 km) |
| Caister-on-Sea to Sovicille | 780.91 mi (1,256.76 km) |
