| Castel Mella to Oerlinghausen | 451.86 mi (727.20 km) |
| Castel Mella to Oestrich-Winkel | 326.53 mi (525.50 km) |
| Castel Mella to Offenburg | 230.05 mi (370.23 km) |
| Castel Mella to Oftersheim | 277.24 mi (446.18 km) |
| Castel Mella to Ohrdruf | 369.11 mi (594.03 km) |
| Castel Mella to Ohringen | 257.45 mi (414.32 km) |
| Castel Mella to Olbernhau | 385.95 mi (621.12 km) |
| Castel Mella to Olching | 194.52 mi (313.05 km) |
| Castel Mella to Oldenburg | 535.24 mi (861.38 km) |
| Castel Mella to Oldenburg in Holstein | 608.89 mi (979.91 km) |
| Castel Mella to Olfen | 447.66 mi (720.43 km) |
| Castel Mella to Olpe | 395.73 mi (636.87 km) |
| Castel Mella to Olsberg | 411.33 mi (661.97 km) |
| Castel Mella to Oranienburg | 520.17 mi (837.14 km) |
| Castel Mella to Ortenberg | 339.30 mi (546.05 km) |
