| Horsens to Oria | 1,118.42 mi (1,799.92 km) |
| Horsens to Oristano | 1,103.71 mi (1,776.24 km) |
| Horsens to Orta Nova | 1,037.96 mi (1,670.43 km) |
| Horsens to Orte | 932.62 mi (1,500.90 km) |
| Horsens to Ortona | 955.23 mi (1,537.30 km) |
| Horsens to Orvieto | 913.46 mi (1,470.07 km) |
| Horsens to Orzinuovi | 722.61 mi (1,162.92 km) |
| Horsens to Osimo | 870.02 mi (1,400.16 km) |
| Horsens to Ospitaletto | 711.93 mi (1,145.75 km) |
| Horsens to Ostuni | 1,102.19 mi (1,773.81 km) |
| Horsens to Ottaviano | 1,057.92 mi (1,702.56 km) |
| Horsens to Ovada | 776.96 mi (1,250.39 km) |
| Horsens to Ozieri | 1,055.99 mi (1,699.45 km) |
| Horsens to Paceco | 1,241.36 mi (1,997.78 km) |
| Horsens to Pachino | 1,345.16 mi (2,164.82 km) |
