| Castrovillari to Octeville | 1,102.85 mi (1,774.87 km) |
| Castrovillari to Oignies | 974.79 mi (1,568.77 km) |
| Castrovillari to Oissel | 989.66 mi (1,592.71 km) |
| Castrovillari to Olivet | 901.41 mi (1,450.69 km) |
| Castrovillari to Ollioules | 582.51 mi (937.46 km) |
| Castrovillari to Olonne-sur-Mer | 1,014.42 mi (1,632.54 km) |
| Castrovillari to Oloron-Sainte-Marie | 898.67 mi (1,446.27 km) |
| Castrovillari to Onet Village | 763.92 mi (1,229.41 km) |
| Castrovillari to Onnaing | 951.89 mi (1,531.93 km) |
| Castrovillari to Orange | 656.04 mi (1,055.79 km) |
| Castrovillari to Orchies | 967.16 mi (1,556.50 km) |
| Castrovillari to Orleans | 902.54 mi (1,452.49 km) |
| Castrovillari to Orly | 917.71 mi (1,476.91 km) |
| Castrovillari to Ormesson-sur-Marne | 914.19 mi (1,471.25 km) |
| Castrovillari to Orsay | 923.31 mi (1,485.93 km) |
