| Plymstock to Oberkirch | 560.49 mi (902.03 km) |
| Plymstock to Obernburg am Main | 586.74 mi (944.27 km) |
| Plymstock to Obernkirchen | 584.59 mi (940.81 km) |
| Plymstock to Oberschleissheim | 718.80 mi (1,156.80 km) |
| Plymstock to Oberstdorf | 682.62 mi (1,098.57 km) |
| Plymstock to Obertraubling | 731.91 mi (1,177.89 km) |
| Plymstock to Obertshausen | 571.05 mi (919.02 km) |
| Plymstock to Oberursel | 558.71 mi (899.15 km) |
| Plymstock to Ochsenfurt | 629.62 mi (1,013.28 km) |
| Plymstock to Ochsenhausen | 651.87 mi (1,049.09 km) |
| Plymstock to Ochtrup | 503.38 mi (810.12 km) |
| Plymstock to Odenthal | 492.22 mi (792.16 km) |
| Plymstock to Oelde | 540.15 mi (869.29 km) |
| Plymstock to Oelsnitz | 714.75 mi (1,150.29 km) |
| Plymstock to Oer-Erkenschwick | 500.52 mi (805.51 km) |
