| Simmerath to Opwijk | 95.86 mi (154.27 km) |
| Simmerath to Ostend | 153.46 mi (246.97 km) |
| Simmerath to Oud-Heverlee | 73.23 mi (117.86 km) |
| Simmerath to Oud-Turnhout | 75.72 mi (121.87 km) |
| Simmerath to Oudenaarde | 119.33 mi (192.05 km) |
| Simmerath to Oudenburg | 149.34 mi (240.34 km) |
| Simmerath to Oupeye | 29.72 mi (47.83 km) |
| Simmerath to Overijse | 78.34 mi (126.08 km) |
| Simmerath to Overpelt | 57.41 mi (92.39 km) |
| Simmerath to Paal | 57.80 mi (93.01 km) |
| Simmerath to Peer | 52.12 mi (83.88 km) |
| Simmerath to Pepinster | 21.31 mi (34.30 km) |
| Simmerath to Peruwelz | 119.37 mi (192.10 km) |
| Simmerath to Perwez | 65.12 mi (104.79 km) |
| Simmerath to Philippeville | 81.86 mi (131.75 km) |
