| Harsewinkel to Octeville | 460.16 mi (740.56 km) |
| Harsewinkel to Oignies | 249.17 mi (400.99 km) |
| Harsewinkel to Oissel | 361.37 mi (581.57 km) |
| Harsewinkel to Olivet | 399.39 mi (642.75 km) |
| Harsewinkel to Ollioules | 619.88 mi (997.61 km) |
| Harsewinkel to Olonne-sur-Mer | 585.97 mi (943.03 km) |
| Harsewinkel to Oloron-Sainte-Marie | 731.72 mi (1,177.59 km) |
| Harsewinkel to Onet Village | 585.54 mi (942.34 km) |
| Harsewinkel to Onnaing | 228.43 mi (367.62 km) |
| Harsewinkel to Orange | 563.36 mi (906.64 km) |
| Harsewinkel to Orchies | 239.17 mi (384.91 km) |
| Harsewinkel to Orleans | 397.16 mi (639.16 km) |
| Harsewinkel to Orly | 340.21 mi (547.51 km) |
| Harsewinkel to Ormesson-sur-Marne | 333.40 mi (536.55 km) |
| Harsewinkel to Orsay | 349.22 mi (562.02 km) |
