| Houthulst to Oignies | 35.23 mi (56.69 km) |
| Houthulst to Oissel | 139.83 mi (225.04 km) |
| Houthulst to Olivet | 220.29 mi (354.53 km) |
| Houthulst to Ollioules | 558.39 mi (898.64 km) |
| Houthulst to Olonne-sur-Mer | 374.65 mi (602.95 km) |
| Houthulst to Oloron-Sainte-Marie | 563.09 mi (906.21 km) |
| Houthulst to Onet Village | 457.19 mi (735.78 km) |
| Houthulst to Onnaing | 49.68 mi (79.95 km) |
| Houthulst to Orange | 480.44 mi (773.19 km) |
| Houthulst to Orchies | 37.09 mi (59.69 km) |
| Houthulst to Orleans | 217.60 mi (350.20 km) |
| Houthulst to Orly | 156.37 mi (251.65 km) |
| Houthulst to Ormesson-sur-Marne | 152.59 mi (245.58 km) |
| Houthulst to Orsay | 161.17 mi (259.38 km) |
| Houthulst to Orthez | 545.99 mi (878.69 km) |
