| Nedre Eiker to Oberkirch | 779.93 mi (1,255.18 km) |
| Nedre Eiker to Obernburg am Main | 686.63 mi (1,105.03 km) |
| Nedre Eiker to Obernkirchen | 519.27 mi (835.69 km) |
| Nedre Eiker to Oberschleissheim | 797.97 mi (1,284.20 km) |
| Nedre Eiker to Oberstdorf | 853.71 mi (1,373.91 km) |
| Nedre Eiker to Obertraubling | 750.96 mi (1,208.55 km) |
| Nedre Eiker to Obertshausen | 671.73 mi (1,081.05 km) |
| Nedre Eiker to Oberursel | 663.11 mi (1,067.17 km) |
| Nedre Eiker to Ochsenfurt | 698.86 mi (1,124.71 km) |
| Nedre Eiker to Ochsenhausen | 807.88 mi (1,300.16 km) |
| Nedre Eiker to Ochtrup | 533.59 mi (858.73 km) |
| Nedre Eiker to Odenthal | 613.89 mi (987.95 km) |
| Nedre Eiker to Oelde | 552.81 mi (889.66 km) |
| Nedre Eiker to Oelsnitz | 651.28 mi (1,048.14 km) |
| Nedre Eiker to Oer-Erkenschwick | 571.44 mi (919.64 km) |
