| Ortenberg to Opwijk | 217.48 mi (350.00 km) |
| Ortenberg to Ostend | 274.57 mi (441.88 km) |
| Ortenberg to Oud-Heverlee | 195.26 mi (314.25 km) |
| Ortenberg to Oud-Turnhout | 189.65 mi (305.21 km) |
| Ortenberg to Oudenaarde | 241.60 mi (388.81 km) |
| Ortenberg to Oudenburg | 270.62 mi (435.53 km) |
| Ortenberg to Oupeye | 151.81 mi (244.32 km) |
| Ortenberg to Overijse | 200.60 mi (322.83 km) |
| Ortenberg to Overpelt | 169.68 mi (273.08 km) |
| Ortenberg to Paal | 176.33 mi (283.78 km) |
| Ortenberg to Peer | 166.35 mi (267.71 km) |
| Ortenberg to Pepinster | 143.18 mi (230.43 km) |
| Ortenberg to Peruwelz | 241.01 mi (387.87 km) |
| Ortenberg to Perwez | 187.29 mi (301.41 km) |
| Ortenberg to Philippeville | 199.19 mi (320.57 km) |
