| Horley to Octeville | 124.99 mi (201.15 km) |
| Horley to Oignies | 146.49 mi (235.75 km) |
| Horley to Oissel | 138.34 mi (222.63 km) |
| Horley to Olivet | 246.85 mi (397.27 km) |
| Horley to Ollioules | 622.51 mi (1,001.83 km) |
| Horley to Olonne-sur-Mer | 328.59 mi (528.81 km) |
| Horley to Oloron-Sainte-Marie | 551.73 mi (887.92 km) |
| Horley to Onet Village | 487.54 mi (784.62 km) |
| Horley to Onnaing | 173.41 mi (279.07 km) |
| Horley to Orange | 538.27 mi (866.26 km) |
| Horley to Orchies | 156.72 mi (252.22 km) |
| Horley to Orleans | 244.51 mi (393.51 km) |
| Horley to Orly | 202.92 mi (326.57 km) |
| Horley to Ormesson-sur-Marne | 204.25 mi (328.70 km) |
| Horley to Orsay | 200.66 mi (322.93 km) |
