| Horizon West to Octeville | 4,317.10 mi (6,947.71 km) |
| Horizon West to Oignies | 4,502.82 mi (7,246.60 km) |
| Horizon West to Oissel | 4,441.04 mi (7,147.17 km) |
| Horizon West to Olivet | 4,503.36 mi (7,247.46 km) |
| Horizon West to Ollioules | 4,785.62 mi (7,701.72 km) |
| Horizon West to Olonne-sur-Mer | 4,360.14 mi (7,016.97 km) |
| Horizon West to Oloron-Sainte-Marie | 4,475.47 mi (7,202.58 km) |
| Horizon West to Onet Village | 4,604.60 mi (7,410.39 km) |
| Horizon West to Onnaing | 4,529.97 mi (7,290.28 km) |
| Horizon West to Orange | 4,713.63 mi (7,585.86 km) |
| Horizon West to Orchies | 4,513.35 mi (7,263.53 km) |
| Horizon West to Orleans | 4,503.02 mi (7,246.90 km) |
| Horizon West to Orly | 4,508.70 mi (7,256.06 km) |
| Horizon West to Ormesson-sur-Marne | 4,514.30 mi (7,265.06 km) |
| Horizon West to Orsay | 4,500.54 mi (7,242.92 km) |
