| Belley to Oignies | 348.30 mi (560.53 km) |
| Belley to Oissel | 327.33 mi (526.79 km) |
| Belley to Olivet | 230.66 mi (371.21 km) |
| Belley to Ollioules | 181.18 mi (291.58 km) |
| Belley to Olonne-sur-Mer | 361.01 mi (580.99 km) |
| Belley to Oloron-Sainte-Marie | 357.22 mi (574.89 km) |
| Belley to Onet Village | 179.09 mi (288.21 km) |
| Belley to Onnaing | 334.01 mi (537.53 km) |
| Belley to Orange | 119.95 mi (193.03 km) |
| Belley to Orchies | 344.71 mi (554.76 km) |
| Belley to Orleans | 231.99 mi (373.35 km) |
| Belley to Orly | 257.65 mi (414.65 km) |
| Belley to Ormesson-sur-Marne | 255.95 mi (411.91 km) |
| Belley to Orsay | 261.11 mi (420.22 km) |
| Belley to Orthez | 354.12 mi (569.91 km) |
