| Middelharnis to Oberkirch | 281.74 mi (453.41 km) |
| Middelharnis to Obernburg am Main | 254.00 mi (408.77 km) |
| Middelharnis to Obernkirchen | 213.39 mi (343.42 km) |
| Middelharnis to Oberschleissheim | 407.59 mi (655.96 km) |
| Middelharnis to Oberstdorf | 405.72 mi (652.95 km) |
| Middelharnis to Obertraubling | 401.27 mi (645.78 km) |
| Middelharnis to Obertshausen | 234.04 mi (376.65 km) |
| Middelharnis to Oberursel | 219.44 mi (353.15 km) |
| Middelharnis to Ochsenfurt | 295.92 mi (476.24 km) |
| Middelharnis to Ochsenhausen | 361.27 mi (581.41 km) |
| Middelharnis to Ochtrup | 132.33 mi (212.96 km) |
| Middelharnis to Odenthal | 136.34 mi (219.42 km) |
| Middelharnis to Oelde | 170.16 mi (273.85 km) |
| Middelharnis to Oelsnitz | 358.90 mi (577.59 km) |
| Middelharnis to Oer-Erkenschwick | 132.14 mi (212.66 km) |
