| Overlea to Opwijk | 3,810.89 mi (6,133.03 km) |
| Overlea to Ostend | 3,753.28 mi (6,040.32 km) |
| Overlea to Oud-Heverlee | 3,833.87 mi (6,170.02 km) |
| Overlea to Oud-Turnhout | 3,834.14 mi (6,170.45 km) |
| Overlea to Oudenaarde | 3,790.19 mi (6,099.73 km) |
| Overlea to Oudenburg | 3,757.58 mi (6,047.25 km) |
| Overlea to Oupeye | 3,876.62 mi (6,238.81 km) |
| Overlea to Overijse | 3,829.76 mi (6,163.41 km) |
| Overlea to Overpelt | 3,854.10 mi (6,202.57 km) |
| Overlea to Paal | 3,848.94 mi (6,194.27 km) |
| Overlea to Peer | 3,857.77 mi (6,208.48 km) |
| Overlea to Pepinster | 3,887.42 mi (6,256.19 km) |
| Overlea to Peruwelz | 3,797.93 mi (6,112.18 km) |
| Overlea to Perwez | 3,845.32 mi (6,188.45 km) |
| Overlea to Philippeville | 3,845.63 mi (6,188.95 km) |
