| Seneffe to Oignies | 55.39 mi (89.15 km) |
| Seneffe to Oissel | 162.79 mi (261.98 km) |
| Seneffe to Olivet | 212.74 mi (342.37 km) |
| Seneffe to Ollioules | 516.38 mi (831.03 km) |
| Seneffe to Olonne-sur-Mer | 389.89 mi (627.47 km) |
| Seneffe to Oloron-Sainte-Marie | 556.27 mi (895.23 km) |
| Seneffe to Onet Village | 433.09 mi (696.99 km) |
| Seneffe to Onnaing | 30.39 mi (48.90 km) |
| Seneffe to Orange | 442.62 mi (712.34 km) |
| Seneffe to Orchies | 44.38 mi (71.43 km) |
| Seneffe to Orleans | 210.22 mi (338.31 km) |
| Seneffe to Orly | 148.96 mi (239.72 km) |
| Seneffe to Ormesson-sur-Marne | 142.96 mi (230.07 km) |
| Seneffe to Orsay | 156.84 mi (252.41 km) |
| Seneffe to Orthez | 540.90 mi (870.49 km) |
