| Genappe to Oignies | 64.59 mi (103.95 km) |
| Genappe to Oissel | 172.70 mi (277.93 km) |
| Genappe to Olivet | 221.26 mi (356.08 km) |
| Genappe to Ollioules | 519.66 mi (836.31 km) |
| Genappe to Olonne-sur-Mer | 399.48 mi (642.89 km) |
| Genappe to Oloron-Sainte-Marie | 564.32 mi (908.18 km) |
| Genappe to Onet Village | 439.35 mi (707.07 km) |
| Genappe to Onnaing | 40.21 mi (64.72 km) |
| Genappe to Orange | 446.78 mi (719.02 km) |
| Genappe to Orchies | 53.65 mi (86.35 km) |
| Genappe to Orleans | 218.76 mi (352.06 km) |
| Genappe to Orly | 157.81 mi (253.97 km) |
| Genappe to Ormesson-sur-Marne | 151.69 mi (244.12 km) |
| Genappe to Orsay | 165.85 mi (266.91 km) |
| Genappe to Orthez | 549.10 mi (883.69 km) |
