| Milford Haven to Octeville | 207.23 mi (333.50 km) |
| Milford Haven to Oignies | 358.99 mi (577.74 km) |
| Milford Haven to Oissel | 315.21 mi (507.29 km) |
| Milford Haven to Olivet | 407.97 mi (656.57 km) |
| Milford Haven to Ollioules | 779.41 mi (1,254.34 km) |
| Milford Haven to Olonne-sur-Mer | 387.02 mi (622.84 km) |
| Milford Haven to Oloron-Sainte-Marie | 623.79 mi (1,003.90 km) |
| Milford Haven to Onet Village | 617.53 mi (993.81 km) |
| Milford Haven to Onnaing | 386.08 mi (621.33 km) |
| Milford Haven to Orange | 693.08 mi (1,115.41 km) |
| Milford Haven to Orchies | 369.43 mi (594.54 km) |
| Milford Haven to Orleans | 406.43 mi (654.09 km) |
| Milford Haven to Orly | 387.18 mi (623.11 km) |
| Milford Haven to Ormesson-sur-Marne | 391.02 mi (629.28 km) |
| Milford Haven to Orsay | 381.38 mi (613.77 km) |
