| Westlake to Octeville | 3,738.52 mi (6,016.57 km) |
| Westlake to Oignies | 3,899.65 mi (6,275.89 km) |
| Westlake to Oissel | 3,858.03 mi (6,208.89 km) |
| Westlake to Olivet | 3,936.85 mi (6,335.74 km) |
| Westlake to Ollioules | 4,264.00 mi (6,862.24 km) |
| Westlake to Olonne-sur-Mer | 3,824.01 mi (6,154.15 km) |
| Westlake to Oloron-Sainte-Marie | 3,981.04 mi (6,406.86 km) |
| Westlake to Onet Village | 4,081.15 mi (6,567.97 km) |
| Westlake to Onnaing | 3,925.97 mi (6,318.23 km) |
| Westlake to Orange | 4,183.86 mi (6,733.27 km) |
| Westlake to Orchies | 3,909.35 mi (6,291.49 km) |
| Westlake to Orleans | 3,935.97 mi (6,334.33 km) |
| Westlake to Orly | 3,929.21 mi (6,323.45 km) |
| Westlake to Ormesson-sur-Marne | 3,933.79 mi (6,330.83 km) |
| Westlake to Orsay | 3,922.31 mi (6,312.35 km) |
