| Belgrade to Octeville | 1,084.42 mi (1,745.21 km) |
| Belgrade to Oignies | 898.97 mi (1,446.76 km) |
| Belgrade to Oissel | 960.15 mi (1,545.22 km) |
| Belgrade to Olivet | 907.48 mi (1,460.46 km) |
| Belgrade to Ollioules | 734.72 mi (1,182.43 km) |
| Belgrade to Olonne-sur-Mer | 1,076.20 mi (1,731.98 km) |
| Belgrade to Oloron-Sainte-Marie | 1,049.95 mi (1,689.73 km) |
| Belgrade to Onet Village | 877.86 mi (1,412.78 km) |
| Belgrade to Onnaing | 872.00 mi (1,403.35 km) |
| Belgrade to Orange | 771.77 mi (1,242.05 km) |
| Belgrade to Orchies | 888.69 mi (1,430.21 km) |
| Belgrade to Orleans | 907.40 mi (1,460.33 km) |
| Belgrade to Orly | 894.28 mi (1,439.21 km) |
| Belgrade to Ormesson-sur-Marne | 888.33 mi (1,429.64 km) |
| Belgrade to Orsay | 902.90 mi (1,453.08 km) |
