| Gennevilliers to Oignies | 110.55 mi (177.92 km) |
| Gennevilliers to Oissel | 61.50 mi (98.97 km) |
| Gennevilliers to Olivet | 76.13 mi (122.51 km) |
| Gennevilliers to Ollioules | 434.84 mi (699.81 km) |
| Gennevilliers to Olonne-sur-Mer | 251.44 mi (404.65 km) |
| Gennevilliers to Oloron-Sainte-Marie | 420.22 mi (676.28 km) |
| Gennevilliers to Onet Village | 315.90 mi (508.40 km) |
| Gennevilliers to Onnaing | 116.06 mi (186.78 km) |
| Gennevilliers to Orange | 352.07 mi (566.60 km) |
| Gennevilliers to Orchies | 114.55 mi (184.35 km) |
| Gennevilliers to Orleans | 73.44 mi (118.20 km) |
| Gennevilliers to Orly | 13.75 mi (22.13 km) |
| Gennevilliers to Ormesson-sur-Marne | 14.87 mi (23.94 km) |
| Gennevilliers to Orsay | 17.04 mi (27.42 km) |
| Gennevilliers to Orthez | 403.77 mi (649.81 km) |
