| Castelli Calepio to Novi di Modena | 70.59 mi (113.60 km) |
| Castelli Calepio to Novi Ligure | 81.19 mi (130.66 km) |
| Castelli Calepio to Nuoro | 368.45 mi (592.97 km) |
| Castelli Calepio to Occhiobello | 95.39 mi (153.51 km) |
| Castelli Calepio to Oderzo | 125.51 mi (201.99 km) |
| Castelli Calepio to Oggiono | 28.49 mi (45.85 km) |
| Castelli Calepio to Olbia | 326.50 mi (525.46 km) |
| Castelli Calepio to Oleggio | 61.26 mi (98.59 km) |
| Castelli Calepio to Olgiate Comasco | 46.21 mi (74.36 km) |
| Castelli Calepio to Olgiate Olona | 49.12 mi (79.05 km) |
| Castelli Calepio to Omegna | 73.94 mi (118.99 km) |
| Castelli Calepio to Opera | 37.32 mi (60.07 km) |
| Castelli Calepio to Oppeano | 66.31 mi (106.72 km) |
| Castelli Calepio to Orbassano | 122.68 mi (197.43 km) |
| Castelli Calepio to Orbetello | 230.10 mi (370.30 km) |
