| Kazanlak to Oignies | 1,188.64 mi (1,912.93 km) |
| Kazanlak to Oissel | 1,249.39 mi (2,010.69 km) |
| Kazanlak to Olivet | 1,193.95 mi (1,921.48 km) |
| Kazanlak to Ollioules | 988.42 mi (1,590.71 km) |
| Kazanlak to Olonne-sur-Mer | 1,357.37 mi (2,184.48 km) |
| Kazanlak to Oloron-Sainte-Marie | 1,311.48 mi (2,110.62 km) |
| Kazanlak to Onet Village | 1,145.81 mi (1,844.01 km) |
| Kazanlak to Onnaing | 1,161.64 mi (1,869.48 km) |
| Kazanlak to Orange | 1,036.64 mi (1,668.31 km) |
| Kazanlak to Orchies | 1,178.32 mi (1,896.32 km) |
| Kazanlak to Orleans | 1,193.98 mi (1,921.53 km) |
| Kazanlak to Orly | 1,182.92 mi (1,903.73 km) |
| Kazanlak to Ormesson-sur-Marne | 1,177.08 mi (1,894.32 km) |
| Kazanlak to Orsay | 1,191.41 mi (1,917.39 km) |
| Kazanlak to Orthez | 1,317.25 mi (2,119.91 km) |
