| Harelbeke to Oignies | 30.21 mi (48.62 km) |
| Harelbeke to Oissel | 143.69 mi (231.24 km) |
| Harelbeke to Olivet | 216.32 mi (348.13 km) |
| Harelbeke to Ollioules | 546.33 mi (879.23 km) |
| Harelbeke to Olonne-sur-Mer | 377.85 mi (608.09 km) |
| Harelbeke to Oloron-Sainte-Marie | 560.49 mi (902.01 km) |
| Harelbeke to Onet Village | 449.74 mi (723.78 km) |
| Harelbeke to Onnaing | 34.72 mi (55.88 km) |
| Harelbeke to Orange | 469.40 mi (755.42 km) |
| Harelbeke to Orchies | 26.57 mi (42.75 km) |
| Harelbeke to Orleans | 213.65 mi (343.84 km) |
| Harelbeke to Orly | 151.64 mi (244.04 km) |
| Harelbeke to Ormesson-sur-Marne | 147.19 mi (236.88 km) |
| Harelbeke to Orsay | 157.37 mi (253.26 km) |
| Harelbeke to Orthez | 543.84 mi (875.23 km) |
