| Birkenhead to Octeville | 266.79 mi (429.36 km) |
| Birkenhead to Oignies | 325.88 mi (524.45 km) |
| Birkenhead to Oissel | 331.10 mi (532.85 km) |
| Birkenhead to Olivet | 438.32 mi (705.41 km) |
| Birkenhead to Ollioules | 815.90 mi (1,313.07 km) |
| Birkenhead to Olonne-sur-Mer | 476.95 mi (767.57 km) |
| Birkenhead to Oloron-Sainte-Marie | 713.20 mi (1,147.78 km) |
| Birkenhead to Onet Village | 673.26 mi (1,083.50 km) |
| Birkenhead to Onnaing | 349.93 mi (563.16 km) |
| Birkenhead to Orange | 731.01 mi (1,176.44 km) |
| Birkenhead to Orchies | 334.07 mi (537.63 km) |
| Birkenhead to Orleans | 436.14 mi (701.90 km) |
| Birkenhead to Orly | 397.61 mi (639.90 km) |
| Birkenhead to Ormesson-sur-Marne | 398.99 mi (642.11 km) |
| Birkenhead to Orsay | 395.09 mi (635.84 km) |
