| Castel Bolognese to Settimo Torinese | 205.85 mi (331.29 km) |
| Castel Bolognese to Seveso | 159.16 mi (256.14 km) |
| Castel Bolognese to Sezze | 204.89 mi (329.74 km) |
| Castel Bolognese to Siano | 283.95 mi (456.97 km) |
| Castel Bolognese to Siena | 72.83 mi (117.21 km) |
| Castel Bolognese to Signa | 50.66 mi (81.53 km) |
| Castel Bolognese to Silea | 95.58 mi (153.82 km) |
| Castel Bolognese to Silvi Paese | 168.54 mi (271.24 km) |
| Castel Bolognese to Sinalunga | 76.08 mi (122.43 km) |
| Castel Bolognese to Siniscola | 279.91 mi (450.47 km) |
| Castel Bolognese to Sinnai | 371.30 mi (597.56 km) |
| Castel Bolognese to Siracusa | 532.90 mi (857.63 km) |
| Castel Bolognese to Solaro | 160.23 mi (257.86 km) |
| Castel Bolognese to Soliera | 52.03 mi (83.74 km) |
| Castel Bolognese to Solofra | 286.32 mi (460.79 km) |
