| Slovenj Gradec to Octeville | 799.68 mi (1,286.95 km) |
| Slovenj Gradec to Oignies | 616.37 mi (991.95 km) |
| Slovenj Gradec to Oissel | 675.40 mi (1,086.95 km) |
| Slovenj Gradec to Olivet | 625.07 mi (1,005.95 km) |
| Slovenj Gradec to Ollioules | 508.39 mi (818.18 km) |
| Slovenj Gradec to Olonne-sur-Mer | 799.63 mi (1,286.89 km) |
| Slovenj Gradec to Oloron-Sainte-Marie | 800.20 mi (1,287.79 km) |
| Slovenj Gradec to Onet Village | 622.45 mi (1,001.74 km) |
| Slovenj Gradec to Onnaing | 589.60 mi (948.88 km) |
| Slovenj Gradec to Orange | 524.64 mi (844.32 km) |
| Slovenj Gradec to Orchies | 606.29 mi (975.73 km) |
| Slovenj Gradec to Orleans | 624.86 mi (1,005.61 km) |
| Slovenj Gradec to Orly | 609.79 mi (981.36 km) |
| Slovenj Gradec to Ormesson-sur-Marne | 603.78 mi (971.69 km) |
| Slovenj Gradec to Orsay | 618.49 mi (995.36 km) |
