| Overpelt to Oignies | 117.65 mi (189.34 km) |
| Overpelt to Oissel | 230.70 mi (371.28 km) |
| Overpelt to Olivet | 280.14 mi (450.83 km) |
| Overpelt to Ollioules | 558.45 mi (898.74 km) |
| Overpelt to Olonne-sur-Mer | 459.29 mi (739.16 km) |
| Overpelt to Oloron-Sainte-Marie | 621.74 mi (1,000.60 km) |
| Overpelt to Onet Village | 491.07 mi (790.30 km) |
| Overpelt to Onnaing | 97.91 mi (157.56 km) |
| Overpelt to Orange | 489.88 mi (788.39 km) |
| Overpelt to Orchies | 107.75 mi (173.41 km) |
| Overpelt to Orleans | 277.69 mi (446.89 km) |
| Overpelt to Orly | 217.31 mi (349.73 km) |
| Overpelt to Ormesson-sur-Marne | 211.04 mi (339.63 km) |
| Overpelt to Orsay | 225.54 mi (362.97 km) |
| Overpelt to Orthez | 606.97 mi (976.83 km) |
