| Mechelen to Oignies | 75.60 mi (121.67 km) |
| Mechelen to Oissel | 189.84 mi (305.52 km) |
| Mechelen to Olivet | 247.39 mi (398.14 km) |
| Mechelen to Ollioules | 548.79 mi (883.19 km) |
| Mechelen to Olonne-sur-Mer | 420.86 mi (677.30 km) |
| Mechelen to Oloron-Sainte-Marie | 591.40 mi (951.77 km) |
| Mechelen to Onet Village | 468.56 mi (754.07 km) |
| Mechelen to Onnaing | 58.71 mi (94.48 km) |
| Mechelen to Orange | 476.26 mi (766.47 km) |
| Mechelen to Orchies | 66.19 mi (106.53 km) |
| Mechelen to Orleans | 244.84 mi (394.03 km) |
| Mechelen to Orly | 183.12 mi (294.71 km) |
| Mechelen to Ormesson-sur-Marne | 177.37 mi (285.45 km) |
| Mechelen to Orsay | 190.61 mi (306.76 km) |
| Mechelen to Orthez | 575.85 mi (926.74 km) |
