| Boulogne-Billancourt to Oignies | 117.81 mi (189.60 km) |
| Boulogne-Billancourt to Oissel | 62.70 mi (100.90 km) |
| Boulogne-Billancourt to Olivet | 68.91 mi (110.89 km) |
| Boulogne-Billancourt to Ollioules | 429.81 mi (691.71 km) |
| Boulogne-Billancourt to Olonne-sur-Mer | 245.07 mi (394.40 km) |
| Boulogne-Billancourt to Oloron-Sainte-Marie | 412.93 mi (664.55 km) |
| Boulogne-Billancourt to Onet Village | 309.27 mi (497.73 km) |
| Boulogne-Billancourt to Onnaing | 123.28 mi (198.40 km) |
| Boulogne-Billancourt to Orange | 346.72 mi (557.99 km) |
| Boulogne-Billancourt to Orchies | 121.84 mi (196.08 km) |
| Boulogne-Billancourt to Orleans | 66.22 mi (106.57 km) |
| Boulogne-Billancourt to Orly | 9.36 mi (15.06 km) |
| Boulogne-Billancourt to Ormesson-sur-Marne | 13.96 mi (22.46 km) |
| Boulogne-Billancourt to Orsay | 9.78 mi (15.74 km) |
| Boulogne-Billancourt to Orthez | 396.48 mi (638.08 km) |
