| Milford Haven to Nuth | 474.60 mi (763.79 km) |
| Milford Haven to Oegstgeest | 405.98 mi (653.35 km) |
| Milford Haven to Oirschot | 443.68 mi (714.04 km) |
| Milford Haven to Oisterwijk | 438.85 mi (706.26 km) |
| Milford Haven to Oldebroek | 466.94 mi (751.47 km) |
| Milford Haven to Oldenzaal | 510.37 mi (821.36 km) |
| Milford Haven to Ommen | 488.83 mi (786.69 km) |
| Milford Haven to Oosterend | 476.64 mi (767.08 km) |
| Milford Haven to Oosterhout | 423.83 mi (682.09 km) |
| Milford Haven to Oosterwolde | 485.85 mi (781.89 km) |
| Milford Haven to Oostzaan | 424.11 mi (682.54 km) |
| Milford Haven to Opmeer | 428.19 mi (689.10 km) |
| Milford Haven to Oss | 451.40 mi (726.45 km) |
| Milford Haven to Oud-Beijerland | 403.56 mi (649.46 km) |
| Milford Haven to Oudenbosch | 409.90 mi (659.67 km) |
