| Rotterdam to Opwijk | 67.04 mi (107.89 km) |
| Rotterdam to Ostend | 82.98 mi (133.54 km) |
| Rotterdam to Oud-Heverlee | 75.20 mi (121.02 km) |
| Rotterdam to Oud-Turnhout | 46.35 mi (74.60 km) |
| Rotterdam to Oudenaarde | 83.29 mi (134.05 km) |
| Rotterdam to Oudenburg | 81.98 mi (131.93 km) |
| Rotterdam to Oupeye | 96.99 mi (156.10 km) |
| Rotterdam to Overijse | 78.32 mi (126.05 km) |
| Rotterdam to Overpelt | 62.36 mi (100.36 km) |
| Rotterdam to Paal | 67.19 mi (108.13 km) |
| Rotterdam to Peer | 67.93 mi (109.32 km) |
| Rotterdam to Pepinster | 109.28 mi (175.88 km) |
| Rotterdam to Peruwelz | 104.55 mi (168.25 km) |
| Rotterdam to Perwez | 90.34 mi (145.39 km) |
| Rotterdam to Philippeville | 118.63 mi (190.92 km) |
