| Horsholm to Oestrich-Winkel | 447.33 mi (719.90 km) |
| Horsholm to Offenburg | 547.39 mi (880.93 km) |
| Horsholm to Oftersheim | 478.74 mi (770.46 km) |
| Horsholm to Ohrdruf | 356.64 mi (573.95 km) |
| Horsholm to Ohringen | 478.44 mi (769.98 km) |
| Horsholm to Olbernhau | 361.83 mi (582.31 km) |
| Horsholm to Olching | 533.05 mi (857.85 km) |
| Horsholm to Oldenburg | 255.67 mi (411.46 km) |
| Horsholm to Oldenburg in Holstein | 126.68 mi (203.87 km) |
| Horsholm to Olfen | 355.46 mi (572.05 km) |
| Horsholm to Olpe | 387.00 mi (622.82 km) |
| Horsholm to Olsberg | 353.68 mi (569.19 km) |
| Horsholm to Oranienburg | 217.96 mi (350.78 km) |
| Horsholm to Ortenberg | 407.55 mi (655.88 km) |
| Horsholm to Oschatz | 317.40 mi (510.80 km) |
