| Horten to Octeville | 829.38 mi (1,334.76 km) |
| Horten to Oignies | 684.36 mi (1,101.37 km) |
| Horten to Oissel | 789.65 mi (1,270.81 km) |
| Horten to Olivet | 869.99 mi (1,400.12 km) |
| Horten to Ollioules | 1,141.60 mi (1,837.22 km) |
| Horten to Olonne-sur-Mer | 1,021.24 mi (1,643.52 km) |
| Horten to Oloron-Sainte-Marie | 1,214.60 mi (1,954.70 km) |
| Horten to Onet Village | 1,090.81 mi (1,755.49 km) |
| Horten to Onnaing | 679.78 mi (1,094.00 km) |
| Horten to Orange | 1,081.99 mi (1,741.30 km) |
| Horten to Orchies | 679.85 mi (1,094.11 km) |
| Horten to Orleans | 867.36 mi (1,395.87 km) |
| Horten to Orly | 805.12 mi (1,295.71 km) |
| Horten to Ormesson-sur-Marne | 800.09 mi (1,287.61 km) |
| Horten to Orsay | 811.40 mi (1,305.83 km) |
