| Genk to Oignies | 114.98 mi (185.04 km) |
| Genk to Oissel | 225.16 mi (362.36 km) |
| Genk to Olivet | 268.54 mi (432.18 km) |
| Genk to Ollioules | 541.02 mi (870.69 km) |
| Genk to Olonne-sur-Mer | 450.75 mi (725.41 km) |
| Genk to Oloron-Sainte-Marie | 608.58 mi (979.41 km) |
| Genk to Onet Village | 475.61 mi (765.43 km) |
| Genk to Onnaing | 92.44 mi (148.78 km) |
| Genk to Orange | 472.86 mi (760.99 km) |
| Genk to Orchies | 104.44 mi (168.08 km) |
| Genk to Orleans | 266.15 mi (428.33 km) |
| Genk to Orly | 206.75 mi (332.73 km) |
| Genk to Ormesson-sur-Marne | 200.25 mi (322.26 km) |
| Genk to Orsay | 215.32 mi (346.52 km) |
| Genk to Orthez | 594.13 mi (956.16 km) |
