| Morlanwelz-Mariemont to Oignies | 54.55 mi (87.78 km) |
| Morlanwelz-Mariemont to Oissel | 159.41 mi (256.54 km) |
| Morlanwelz-Mariemont to Olivet | 207.43 mi (333.83 km) |
| Morlanwelz-Mariemont to Ollioules | 510.81 mi (822.07 km) |
| Morlanwelz-Mariemont to Olonne-sur-Mer | 385.46 mi (620.34 km) |
| Morlanwelz-Mariemont to Oloron-Sainte-Marie | 550.79 mi (886.40 km) |
| Morlanwelz-Mariemont to Onet Village | 427.30 mi (687.67 km) |
| Morlanwelz-Mariemont to Onnaing | 28.29 mi (45.53 km) |
| Morlanwelz-Mariemont to Orange | 436.93 mi (703.17 km) |
| Morlanwelz-Mariemont to Orchies | 43.54 mi (70.07 km) |
| Morlanwelz-Mariemont to Orleans | 204.92 mi (329.79 km) |
| Morlanwelz-Mariemont to Orly | 143.83 mi (231.47 km) |
| Morlanwelz-Mariemont to Ormesson-sur-Marne | 137.75 mi (221.69 km) |
| Morlanwelz-Mariemont to Orsay | 151.82 mi (244.33 km) |
| Morlanwelz-Mariemont to Orthez | 535.47 mi (861.75 km) |
