| Oer-Erkenschwick to Oberkirch | 217.95 mi (350.75 km) |
| Oer-Erkenschwick to Obernburg am Main | 149.45 mi (240.52 km) |
| Oer-Erkenschwick to Obernkirchen | 90.44 mi (145.55 km) |
| Oer-Erkenschwick to Oberschleissheim | 302.80 mi (487.31 km) |
| Oer-Erkenschwick to Oberstdorf | 322.37 mi (518.80 km) |
| Oer-Erkenschwick to Obertraubling | 284.96 mi (458.60 km) |
| Oer-Erkenschwick to Obertshausen | 128.89 mi (207.43 km) |
| Oer-Erkenschwick to Oberursel | 114.97 mi (185.03 km) |
| Oer-Erkenschwick to Ochsenfurt | 184.82 mi (297.43 km) |
| Oer-Erkenschwick to Ochsenhausen | 274.32 mi (441.48 km) |
| Oer-Erkenschwick to Ochtrup | 39.01 mi (62.78 km) |
| Oer-Erkenschwick to Odenthal | 42.47 mi (68.34 km) |
| Oer-Erkenschwick to Oelde | 40.68 mi (65.46 km) |
| Oer-Erkenschwick to Oelsnitz | 229.73 mi (369.71 km) |
| Oer-Erkenschwick to Oerlinghausen | 64.51 mi (103.82 km) |
