| Milford Haven to Opwijk | 401.27 mi (645.78 km) |
| Milford Haven to Ostend | 344.17 mi (553.89 km) |
| Milford Haven to Oud-Heverlee | 423.75 mi (681.96 km) |
| Milford Haven to Oud-Turnhout | 431.62 mi (694.63 km) |
| Milford Haven to Oudenaarde | 378.02 mi (608.37 km) |
| Milford Haven to Oudenburg | 348.08 mi (560.17 km) |
| Milford Haven to Oupeye | 467.28 mi (752.01 km) |
| Milford Haven to Overijse | 418.80 mi (673.99 km) |
| Milford Haven to Overpelt | 451.14 mi (726.03 km) |
| Milford Haven to Paal | 442.67 mi (712.40 km) |
| Milford Haven to Peer | 453.60 mi (730.01 km) |
| Milford Haven to Pepinster | 476.92 mi (767.53 km) |
| Milford Haven to Peruwelz | 382.93 mi (616.27 km) |
| Milford Haven to Perwez | 433.31 mi (697.34 km) |
| Milford Haven to Philippeville | 430.05 mi (692.10 km) |
