| Monserrato to Opwijk | 844.50 mi (1,359.09 km) |
| Monserrato to Ostend | 880.43 mi (1,416.92 km) |
| Monserrato to Oud-Heverlee | 829.32 mi (1,334.66 km) |
| Monserrato to Oud-Turnhout | 857.62 mi (1,380.20 km) |
| Monserrato to Oudenaarde | 845.42 mi (1,360.57 km) |
| Monserrato to Oudenburg | 876.39 mi (1,410.41 km) |
| Monserrato to Oupeye | 809.79 mi (1,303.23 km) |
| Monserrato to Overijse | 827.74 mi (1,332.12 km) |
| Monserrato to Overpelt | 846.25 mi (1,361.90 km) |
| Monserrato to Paal | 836.97 mi (1,346.98 km) |
| Monserrato to Peer | 840.24 mi (1,352.23 km) |
| Monserrato to Pepinster | 798.52 mi (1,285.10 km) |
| Monserrato to Peruwelz | 824.18 mi (1,326.39 km) |
| Monserrato to Perwez | 813.60 mi (1,309.37 km) |
| Monserrato to Philippeville | 789.16 mi (1,270.02 km) |
