| Oudenburg to Oignies | 49.34 mi (79.41 km) |
| Oudenburg to Oissel | 152.61 mi (245.60 km) |
| Oudenburg to Olivet | 234.58 mi (377.52 km) |
| Oudenburg to Ollioules | 571.53 mi (919.79 km) |
| Oudenburg to Olonne-sur-Mer | 387.33 mi (623.35 km) |
| Oudenburg to Oloron-Sainte-Marie | 577.20 mi (928.92 km) |
| Oudenburg to Onet Village | 471.43 mi (758.70 km) |
| Oudenburg to Onnaing | 60.86 mi (97.94 km) |
| Oudenburg to Orange | 493.95 mi (794.94 km) |
| Oudenburg to Orchies | 50.11 mi (80.64 km) |
| Oudenburg to Orleans | 231.89 mi (373.19 km) |
| Oudenburg to Orly | 170.69 mi (274.70 km) |
| Oudenburg to Ormesson-sur-Marne | 166.92 mi (268.62 km) |
| Oudenburg to Orsay | 175.47 mi (282.39 km) |
| Oudenburg to Orthez | 560.04 mi (901.30 km) |
