| Castelfidardo to Settimo Torinese | 308.09 mi (495.83 km) |
| Castelfidardo to Seveso | 264.11 mi (425.04 km) |
| Castelfidardo to Sezze | 137.89 mi (221.92 km) |
| Castelfidardo to Siano | 193.08 mi (310.74 km) |
| Castelfidardo to Siena | 111.65 mi (179.68 km) |
| Castelfidardo to Signa | 124.31 mi (200.06 km) |
| Castelfidardo to Silea | 163.36 mi (262.91 km) |
| Castelfidardo to Silvi Paese | 69.43 mi (111.74 km) |
| Castelfidardo to Sinalunga | 92.68 mi (149.16 km) |
| Castelfidardo to Siniscola | 280.87 mi (452.01 km) |
| Castelfidardo to Sinnai | 365.08 mi (587.54 km) |
| Castelfidardo to Siracusa | 451.26 mi (726.23 km) |
| Castelfidardo to Solaro | 265.22 mi (426.83 km) |
| Castelfidardo to Soliera | 157.04 mi (252.74 km) |
| Castelfidardo to Solofra | 193.65 mi (311.66 km) |
