| Castelfidardo to Somma Lombardo | 283.47 mi (456.20 km) |
| Castelfidardo to Somma Vesuviana | 184.79 mi (297.38 km) |
| Castelfidardo to Sommacampagna | 188.62 mi (303.55 km) |
| Castelfidardo to Sona | 190.80 mi (307.07 km) |
| Castelfidardo to Sondrio | 259.57 mi (417.74 km) |
| Castelfidardo to Sora | 120.79 mi (194.40 km) |
| Castelfidardo to Sorbolo | 180.80 mi (290.97 km) |
| Castelfidardo to Soresina | 221.43 mi (356.35 km) |
| Castelfidardo to Sorisole | 247.51 mi (398.33 km) |
| Castelfidardo to Sorrento | 200.52 mi (322.71 km) |
| Castelfidardo to Sorso | 314.16 mi (505.59 km) |
| Castelfidardo to Sortino | 442.09 mi (711.48 km) |
| Castelfidardo to Soverato Marina | 365.44 mi (588.12 km) |
| Castelfidardo to Sovicille | 116.82 mi (188.01 km) |
| Castelfidardo to Spello | 54.90 mi (88.35 km) |
