| Horsholm to Obernburg am Main | 440.21 mi (708.45 km) |
| Horsholm to Obernkirchen | 284.94 mi (458.57 km) |
| Horsholm to Oberschleissheim | 528.70 mi (850.87 km) |
| Horsholm to Oberstdorf | 592.93 mi (954.23 km) |
| Horsholm to Obertraubling | 477.96 mi (769.20 km) |
| Horsholm to Obertshausen | 429.64 mi (691.45 km) |
| Horsholm to Oberursel | 424.71 mi (683.51 km) |
| Horsholm to Ochsenfurt | 442.33 mi (711.87 km) |
| Horsholm to Ochsenhausen | 550.28 mi (885.59 km) |
| Horsholm to Ochtrup | 332.99 mi (535.89 km) |
| Horsholm to Odenthal | 401.42 mi (646.02 km) |
| Horsholm to Oelde | 331.11 mi (532.87 km) |
| Horsholm to Oelsnitz | 377.76 mi (607.95 km) |
| Horsholm to Oer-Erkenschwick | 362.90 mi (584.03 km) |
| Horsholm to Oerlinghausen | 312.21 mi (502.46 km) |
