| Bismarck to Oberkirch | 4,589.58 mi (7,386.21 km) |
| Bismarck to Obernburg am Main | 4,559.31 mi (7,337.50 km) |
| Bismarck to Obernkirchen | 4,440.41 mi (7,146.16 km) |
| Bismarck to Oberschleissheim | 4,714.61 mi (7,587.43 km) |
| Bismarck to Oberstdorf | 4,716.04 mi (7,589.74 km) |
| Bismarck to Obertraubling | 4,697.05 mi (7,559.17 km) |
| Bismarck to Obertshausen | 4,538.54 mi (7,304.08 km) |
| Bismarck to Oberursel | 4,523.84 mi (7,280.41 km) |
| Bismarck to Ochsenfurt | 4,597.62 mi (7,399.16 km) |
| Bismarck to Ochsenhausen | 4,672.29 mi (7,519.33 km) |
| Bismarck to Ochtrup | 4,384.51 mi (7,056.19 km) |
| Bismarck to Odenthal | 4,437.97 mi (7,142.23 km) |
| Bismarck to Oelde | 4,431.79 mi (7,132.28 km) |
| Bismarck to Oelsnitz | 4,623.77 mi (7,441.23 km) |
| Bismarck to Oer-Erkenschwick | 4,413.14 mi (7,102.27 km) |
