| Horta to Octeville | 1,531.20 mi (2,464.23 km) |
| Horta to Oignies | 1,744.81 mi (2,808.01 km) |
| Horta to Oissel | 1,642.10 mi (2,642.71 km) |
| Horta to Olivet | 1,653.87 mi (2,661.64 km) |
| Horta to Ollioules | 1,817.09 mi (2,924.33 km) |
| Horta to Olonne-sur-Mer | 1,466.08 mi (2,359.43 km) |
| Horta to Oloron-Sainte-Marie | 1,492.00 mi (2,401.14 km) |
| Horta to Onet Village | 1,655.72 mi (2,664.63 km) |
| Horta to Onnaing | 1,768.95 mi (2,846.84 km) |
| Horta to Orange | 1,764.75 mi (2,840.10 km) |
| Horta to Orchies | 1,755.52 mi (2,825.24 km) |
| Horta to Orleans | 1,654.79 mi (2,663.12 km) |
| Horta to Orly | 1,688.94 mi (2,718.08 km) |
| Horta to Ormesson-sur-Marne | 1,696.05 mi (2,729.52 km) |
| Horta to Orsay | 1,679.11 mi (2,702.26 km) |
