| Backnang to Octeville | 500.82 mi (805.99 km) |
| Backnang to Oignies | 306.13 mi (492.67 km) |
| Backnang to Oissel | 377.71 mi (607.87 km) |
| Backnang to Olivet | 353.23 mi (568.47 km) |
| Backnang to Ollioules | 436.36 mi (702.25 km) |
| Backnang to Olonne-sur-Mer | 545.94 mi (878.61 km) |
| Backnang to Oloron-Sainte-Marie | 623.16 mi (1,002.87 km) |
| Backnang to Onet Village | 452.76 mi (728.65 km) |
| Backnang to Onnaing | 279.10 mi (449.16 km) |
| Backnang to Orange | 398.06 mi (640.61 km) |
| Backnang to Orchies | 295.77 mi (476.00 km) |
| Backnang to Orleans | 352.17 mi (566.77 km) |
| Backnang to Orly | 320.20 mi (515.31 km) |
| Backnang to Ormesson-sur-Marne | 313.35 mi (504.29 km) |
| Backnang to Orsay | 329.82 mi (530.79 km) |
