| Reguengos de Monsaraz to Opwijk | 1,037.93 mi (1,670.39 km) |
| Reguengos de Monsaraz to Ostend | 1,020.28 mi (1,641.99 km) |
| Reguengos de Monsaraz to Oud-Heverlee | 1,043.89 mi (1,679.98 km) |
| Reguengos de Monsaraz to Oud-Turnhout | 1,078.45 mi (1,735.59 km) |
| Reguengos de Monsaraz to Oudenaarde | 1,016.14 mi (1,635.32 km) |
| Reguengos de Monsaraz to Oudenburg | 1,019.81 mi (1,641.22 km) |
| Reguengos de Monsaraz to Oupeye | 1,065.25 mi (1,714.35 km) |
| Reguengos de Monsaraz to Overijse | 1,037.53 mi (1,669.74 km) |
| Reguengos de Monsaraz to Overpelt | 1,085.13 mi (1,746.34 km) |
| Reguengos de Monsaraz to Paal | 1,068.93 mi (1,720.28 km) |
| Reguengos de Monsaraz to Peer | 1,081.76 mi (1,740.93 km) |
| Reguengos de Monsaraz to Pepinster | 1,063.20 mi (1,711.05 km) |
| Reguengos de Monsaraz to Peruwelz | 997.29 mi (1,604.99 km) |
| Reguengos de Monsaraz to Perwez | 1,036.96 mi (1,668.82 km) |
| Reguengos de Monsaraz to Philippeville | 1,007.10 mi (1,620.77 km) |
