| Backnang to Oestrich-Winkel | 97.08 mi (156.23 km) |
| Backnang to Offenburg | 75.89 mi (122.13 km) |
| Backnang to Oftersheim | 48.17 mi (77.51 km) |
| Backnang to Ohrdruf | 142.35 mi (229.08 km) |
| Backnang to Ohringen | 17.80 mi (28.65 km) |
| Backnang to Olbernhau | 210.70 mi (339.09 km) |
| Backnang to Olching | 100.47 mi (161.69 km) |
| Backnang to Oldenburg | 294.78 mi (474.41 km) |
| Backnang to Oldenburg in Holstein | 375.09 mi (603.65 km) |
| Backnang to Olfen | 211.62 mi (340.57 km) |
| Backnang to Olpe | 159.67 mi (256.97 km) |
| Backnang to Olsberg | 171.28 mi (275.65 km) |
| Backnang to Oranienburg | 311.02 mi (500.53 km) |
| Backnang to Ortenberg | 98.82 mi (159.03 km) |
| Backnang to Oschatz | 230.11 mi (370.33 km) |
