| Samokov to Oignies | 1,123.88 mi (1,808.70 km) |
| Samokov to Oissel | 1,178.83 mi (1,897.15 km) |
| Samokov to Olivet | 1,118.50 mi (1,800.05 km) |
| Samokov to Ollioules | 898.67 mi (1,446.27 km) |
| Samokov to Olonne-sur-Mer | 1,276.83 mi (2,054.86 km) |
| Samokov to Oloron-Sainte-Marie | 1,222.77 mi (1,967.86 km) |
| Samokov to Onet Village | 1,059.48 mi (1,705.07 km) |
| Samokov to Onnaing | 1,097.13 mi (1,765.67 km) |
| Samokov to Orange | 949.64 mi (1,528.30 km) |
| Samokov to Orchies | 1,113.82 mi (1,792.52 km) |
| Samokov to Orleans | 1,118.67 mi (1,800.33 km) |
| Samokov to Orly | 1,110.94 mi (1,787.89 km) |
| Samokov to Ormesson-sur-Marne | 1,105.35 mi (1,778.88 km) |
| Samokov to Orsay | 1,119.13 mi (1,801.07 km) |
| Samokov to Orthez | 1,229.17 mi (1,978.15 km) |
