| Wheat Ridge to Octeville | 4,711.59 mi (7,582.57 km) |
| Wheat Ridge to Oignies | 4,838.85 mi (7,787.37 km) |
| Wheat Ridge to Oissel | 4,821.20 mi (7,758.97 km) |
| Wheat Ridge to Olivet | 4,913.79 mi (7,907.98 km) |
| Wheat Ridge to Ollioules | 5,271.50 mi (8,483.65 km) |
| Wheat Ridge to Olonne-sur-Mer | 4,834.79 mi (7,780.84 km) |
| Wheat Ridge to Oloron-Sainte-Marie | 5,022.03 mi (8,082.17 km) |
| Wheat Ridge to Onet Village | 5,093.64 mi (8,197.43 km) |
| Wheat Ridge to Onnaing | 4,863.02 mi (7,826.28 km) |
| Wheat Ridge to Orange | 5,186.78 mi (8,347.31 km) |
| Wheat Ridge to Orchies | 4,847.16 mi (7,800.76 km) |
| Wheat Ridge to Orleans | 4,912.41 mi (7,905.77 km) |
| Wheat Ridge to Orly | 4,893.04 mi (7,874.59 km) |
| Wheat Ridge to Ormesson-sur-Marne | 4,896.35 mi (7,879.92 km) |
| Wheat Ridge to Orsay | 4,887.76 mi (7,866.10 km) |
