| Herne to Obernburg am Main | 145.09 mi (233.51 km) |
| Herne to Obernkirchen | 94.95 mi (152.81 km) |
| Herne to Oberschleissheim | 299.00 mi (481.20 km) |
| Herne to Oberstdorf | 317.32 mi (510.67 km) |
| Herne to Obertraubling | 282.20 mi (454.15 km) |
| Herne to Obertshausen | 124.43 mi (200.26 km) |
| Herne to Oberursel | 110.33 mi (177.57 km) |
| Herne to Ochsenfurt | 181.24 mi (291.67 km) |
| Herne to Ochsenhausen | 269.34 mi (433.47 km) |
| Herne to Ochtrup | 45.31 mi (72.92 km) |
| Herne to Odenthal | 35.96 mi (57.87 km) |
| Herne to Oelde | 44.51 mi (71.63 km) |
| Herne to Oelsnitz | 229.05 mi (368.62 km) |
| Herne to Oer-Erkenschwick | 6.54 mi (10.52 km) |
| Herne to Oerlinghausen | 68.37 mi (110.03 km) |
