| Ardahan to Octeville | 2,196.74 mi (3,535.31 km) |
| Ardahan to Oignies | 1,991.92 mi (3,205.68 km) |
| Ardahan to Oissel | 2,074.32 mi (3,338.30 km) |
| Ardahan to Olivet | 2,039.34 mi (3,282.00 km) |
| Ardahan to Ollioules | 1,878.59 mi (3,023.31 km) |
| Ardahan to Olonne-sur-Mer | 2,218.35 mi (3,570.09 km) |
| Ardahan to Oloron-Sainte-Marie | 2,198.23 mi (3,537.71 km) |
| Ardahan to Onet Village | 2,027.29 mi (3,262.61 km) |
| Ardahan to Onnaing | 1,965.01 mi (3,162.38 km) |
| Ardahan to Orange | 1,920.60 mi (3,090.91 km) |
| Ardahan to Orchies | 1,980.94 mi (3,188.02 km) |
| Ardahan to Orleans | 2,038.85 mi (3,281.22 km) |
| Ardahan to Orly | 2,015.49 mi (3,243.62 km) |
| Ardahan to Ormesson-sur-Marne | 2,008.86 mi (3,232.95 km) |
| Ardahan to Orsay | 2,024.87 mi (3,258.71 km) |
