| Koper to Octeville | 768.18 mi (1,236.27 km) |
| Koper to Oignies | 600.71 mi (966.75 km) |
| Koper to Oissel | 645.16 mi (1,038.29 km) |
| Koper to Olivet | 582.31 mi (937.13 km) |
| Koper to Ollioules | 423.54 mi (681.63 km) |
| Koper to Olonne-sur-Mer | 745.56 mi (1,199.86 km) |
| Koper to Oloron-Sainte-Marie | 725.63 mi (1,167.78 km) |
| Koper to Onet Village | 550.30 mi (885.62 km) |
| Koper to Onnaing | 575.00 mi (925.38 km) |
| Koper to Orange | 447.65 mi (720.42 km) |
| Koper to Orchies | 591.43 mi (951.81 km) |
| Koper to Orleans | 582.47 mi (937.39 km) |
| Koper to Orly | 576.08 mi (927.10 km) |
| Koper to Ormesson-sur-Marne | 570.71 mi (918.48 km) |
| Koper to Orsay | 584.01 mi (939.87 km) |
