| Bacau to Oberkirch | 886.09 mi (1,426.02 km) |
| Bacau to Obernburg am Main | 846.52 mi (1,362.34 km) |
| Bacau to Obernkirchen | 887.92 mi (1,428.96 km) |
| Bacau to Oberschleissheim | 725.57 mi (1,167.69 km) |
| Bacau to Oberstdorf | 784.61 mi (1,262.70 km) |
| Bacau to Obertraubling | 703.17 mi (1,131.64 km) |
| Bacau to Obertshausen | 862.48 mi (1,388.02 km) |
| Bacau to Oberursel | 875.22 mi (1,408.53 km) |
| Bacau to Ochsenfurt | 803.69 mi (1,293.42 km) |
| Bacau to Ochsenhausen | 799.64 mi (1,286.89 km) |
| Bacau to Ochtrup | 964.43 mi (1,552.10 km) |
| Bacau to Odenthal | 948.52 mi (1,526.49 km) |
| Bacau to Oelde | 918.14 mi (1,477.60 km) |
| Bacau to Oelsnitz | 723.83 mi (1,164.90 km) |
| Bacau to Oer-Erkenschwick | 951.96 mi (1,532.03 km) |
