| Herdecke to Obernburg am Main | 131.23 mi (211.20 km) |
| Herdecke to Obernkirchen | 93.57 mi (150.59 km) |
| Herdecke to Oberschleissheim | 285.06 mi (458.76 km) |
| Herdecke to Oberstdorf | 303.89 mi (489.06 km) |
| Herdecke to Obertraubling | 268.51 mi (432.13 km) |
| Herdecke to Obertshausen | 110.61 mi (178.00 km) |
| Herdecke to Oberursel | 96.59 mi (155.45 km) |
| Herdecke to Ochsenfurt | 167.31 mi (269.26 km) |
| Herdecke to Ochsenhausen | 255.85 mi (411.75 km) |
| Herdecke to Ochtrup | 56.62 mi (91.12 km) |
| Herdecke to Odenthal | 28.80 mi (46.36 km) |
| Herdecke to Oelde | 42.91 mi (69.06 km) |
| Herdecke to Oelsnitz | 217.08 mi (349.36 km) |
| Herdecke to Oer-Erkenschwick | 18.48 mi (29.74 km) |
| Herdecke to Oerlinghausen | 65.76 mi (105.83 km) |
