| Gravesend to Octeville | 153.36 mi (246.81 km) |
| Gravesend to Oignies | 132.53 mi (213.28 km) |
| Gravesend to Oissel | 148.52 mi (239.02 km) |
| Gravesend to Olivet | 256.50 mi (412.79 km) |
| Gravesend to Ollioules | 628.02 mi (1,010.70 km) |
| Gravesend to Olonne-sur-Mer | 352.52 mi (567.33 km) |
| Gravesend to Oloron-Sainte-Marie | 571.65 mi (919.98 km) |
| Gravesend to Onet Village | 499.58 mi (803.99 km) |
| Gravesend to Onnaing | 158.39 mi (254.90 km) |
| Gravesend to Orange | 544.84 mi (876.83 km) |
| Gravesend to Orchies | 141.85 mi (228.29 km) |
| Gravesend to Orleans | 254.02 mi (408.81 km) |
| Gravesend to Orly | 206.84 mi (332.88 km) |
| Gravesend to Ormesson-sur-Marne | 207.13 mi (333.34 km) |
| Gravesend to Orsay | 205.99 mi (331.50 km) |
