| Boulogne-Billancourt to Oestrich-Winkel | 271.00 mi (436.13 km) |
| Boulogne-Billancourt to Offenburg | 261.02 mi (420.07 km) |
| Boulogne-Billancourt to Oftersheim | 289.25 mi (465.51 km) |
| Boulogne-Billancourt to Ohrdruf | 402.45 mi (647.68 km) |
| Boulogne-Billancourt to Ohringen | 329.77 mi (530.71 km) |
| Boulogne-Billancourt to Olbernhau | 510.56 mi (821.66 km) |
| Boulogne-Billancourt to Olching | 417.43 mi (671.79 km) |
| Boulogne-Billancourt to Oldenburg | 394.84 mi (635.43 km) |
| Boulogne-Billancourt to Oldenburg in Holstein | 528.75 mi (850.94 km) |
| Boulogne-Billancourt to Olfen | 301.86 mi (485.80 km) |
| Boulogne-Billancourt to Olpe | 290.74 mi (467.90 km) |
| Boulogne-Billancourt to Olsberg | 326.57 mi (525.56 km) |
| Boulogne-Billancourt to Oranienburg | 550.49 mi (885.92 km) |
| Boulogne-Billancourt to Ortenberg | 322.62 mi (519.20 km) |
| Boulogne-Billancourt to Oschatz | 510.54 mi (821.64 km) |
