| Herenthout to Oignies | 90.58 mi (145.78 km) |
| Herenthout to Oissel | 204.84 mi (329.66 km) |
| Herenthout to Olivet | 260.89 mi (419.85 km) |
| Herenthout to Ollioules | 555.78 mi (894.45 km) |
| Herenthout to Olonne-sur-Mer | 435.62 mi (701.06 km) |
| Herenthout to Oloron-Sainte-Marie | 604.46 mi (972.79 km) |
| Herenthout to Onet Village | 479.44 mi (771.59 km) |
| Herenthout to Onnaing | 73.35 mi (118.05 km) |
| Herenthout to Orange | 484.47 mi (779.67 km) |
| Herenthout to Orchies | 81.21 mi (130.69 km) |
| Herenthout to Orleans | 258.36 mi (415.78 km) |
| Herenthout to Orly | 196.90 mi (316.87 km) |
| Herenthout to Ormesson-sur-Marne | 191.01 mi (307.39 km) |
| Herenthout to Orsay | 204.57 mi (329.23 km) |
| Herenthout to Orthez | 589.10 mi (948.07 km) |
