| Kasterlee to Oignies | 100.94 mi (162.45 km) |
| Kasterlee to Oissel | 215.33 mi (346.54 km) |
| Kasterlee to Olivet | 270.90 mi (435.97 km) |
| Kasterlee to Ollioules | 561.96 mi (904.38 km) |
| Kasterlee to Olonne-sur-Mer | 446.12 mi (717.96 km) |
| Kasterlee to Oloron-Sainte-Marie | 614.22 mi (988.49 km) |
| Kasterlee to Onet Village | 488.00 mi (785.37 km) |
| Kasterlee to Onnaing | 83.85 mi (134.94 km) |
| Kasterlee to Orange | 491.41 mi (790.85 km) |
| Kasterlee to Orchies | 91.67 mi (147.52 km) |
| Kasterlee to Orleans | 268.38 mi (431.92 km) |
| Kasterlee to Orly | 207.05 mi (333.22 km) |
| Kasterlee to Ormesson-sur-Marne | 201.10 mi (323.64 km) |
| Kasterlee to Orsay | 214.81 mi (345.70 km) |
| Kasterlee to Orthez | 598.96 mi (963.93 km) |
