| Castel Mella to Opwijk | 466.65 mi (751.00 km) |
| Castel Mella to Ostend | 515.91 mi (830.28 km) |
| Castel Mella to Oud-Heverlee | 446.53 mi (718.63 km) |
| Castel Mella to Oud-Turnhout | 466.29 mi (750.41 km) |
| Castel Mella to Oudenaarde | 476.81 mi (767.36 km) |
| Castel Mella to Oudenburg | 511.39 mi (823.00 km) |
| Castel Mella to Oupeye | 415.43 mi (668.58 km) |
| Castel Mella to Overijse | 447.28 mi (719.83 km) |
| Castel Mella to Overpelt | 450.59 mi (725.16 km) |
| Castel Mella to Paal | 445.71 mi (717.30 km) |
| Castel Mella to Peer | 444.79 mi (715.82 km) |
| Castel Mella to Pepinster | 403.12 mi (648.75 km) |
| Castel Mella to Peruwelz | 460.38 mi (740.92 km) |
| Castel Mella to Perwez | 431.07 mi (693.74 km) |
| Castel Mella to Philippeville | 415.53 mi (668.74 km) |
