| Nieder-Olm to Obernburg am Main | 42.06 mi (67.69 km) |
| Nieder-Olm to Obernkirchen | 167.69 mi (269.88 km) |
| Nieder-Olm to Oberschleissheim | 190.51 mi (306.59 km) |
| Nieder-Olm to Oberstdorf | 196.92 mi (316.91 km) |
| Nieder-Olm to Obertraubling | 189.61 mi (305.15 km) |
| Nieder-Olm to Obertshausen | 30.07 mi (48.40 km) |
| Nieder-Olm to Oberursel | 26.28 mi (42.30 km) |
| Nieder-Olm to Ochsenfurt | 85.05 mi (136.88 km) |
| Nieder-Olm to Ochsenhausen | 149.51 mi (240.61 km) |
| Nieder-Olm to Ochtrup | 164.70 mi (265.06 km) |
| Nieder-Olm to Odenthal | 91.23 mi (146.82 km) |
| Nieder-Olm to Oelde | 133.02 mi (214.08 km) |
| Nieder-Olm to Oelsnitz | 178.91 mi (287.93 km) |
| Nieder-Olm to Oer-Erkenschwick | 126.81 mi (204.09 km) |
| Nieder-Olm to Oerlinghausen | 143.65 mi (231.18 km) |
