| Castel Bolognese to Somma Lombardo | 178.46 mi (287.20 km) |
| Castel Bolognese to Somma Vesuviana | 273.13 mi (439.56 km) |
| Castel Bolognese to Sommacampagna | 88.13 mi (141.83 km) |
| Castel Bolognese to Sona | 90.51 mi (145.66 km) |
| Castel Bolognese to Sondrio | 158.76 mi (255.49 km) |
| Castel Bolognese to Sora | 201.71 mi (324.63 km) |
| Castel Bolognese to Sorbolo | 75.91 mi (122.16 km) |
| Castel Bolognese to Soresina | 116.46 mi (187.42 km) |
| Castel Bolognese to Sorisole | 143.50 mi (230.94 km) |
| Castel Bolognese to Sorrento | 286.61 mi (461.25 km) |
| Castel Bolognese to Sorso | 293.20 mi (471.86 km) |
| Castel Bolognese to Sortino | 522.09 mi (840.22 km) |
| Castel Bolognese to Soverato Marina | 460.15 mi (740.54 km) |
| Castel Bolognese to Sovicille | 76.79 mi (123.58 km) |
| Castel Bolognese to Spello | 101.57 mi (163.47 km) |
