| Herk-de-Stad to Oignies | 100.53 mi (161.79 km) |
| Herk-de-Stad to Oissel | 211.56 mi (340.47 km) |
| Herk-de-Stad to Olivet | 258.33 mi (415.73 km) |
| Herk-de-Stad to Ollioules | 539.95 mi (868.97 km) |
| Herk-de-Stad to Olonne-sur-Mer | 438.53 mi (705.74 km) |
| Herk-de-Stad to Oloron-Sainte-Marie | 599.81 mi (965.29 km) |
| Herk-de-Stad to Onet Village | 469.74 mi (755.97 km) |
| Herk-de-Stad to Onnaing | 78.62 mi (126.52 km) |
| Herk-de-Stad to Orange | 470.29 mi (756.85 km) |
| Herk-de-Stad to Orchies | 90.09 mi (144.98 km) |
| Herk-de-Stad to Orleans | 255.89 mi (411.81 km) |
| Herk-de-Stad to Orly | 195.72 mi (314.98 km) |
| Herk-de-Stad to Ormesson-sur-Marne | 189.38 mi (304.78 km) |
| Herk-de-Stad to Orsay | 204.05 mi (328.39 km) |
| Herk-de-Stad to Orthez | 585.04 mi (941.53 km) |
