| Hoorn to Octeville | 357.87 mi (575.94 km) |
| Hoorn to Oignies | 175.01 mi (281.65 km) |
| Hoorn to Oissel | 286.48 mi (461.05 km) |
| Hoorn to Olivet | 358.96 mi (577.69 km) |
| Hoorn to Ollioules | 658.10 mi (1,059.11 km) |
| Hoorn to Olonne-sur-Mer | 521.30 mi (838.96 km) |
| Hoorn to Oloron-Sainte-Marie | 703.62 mi (1,132.37 km) |
| Hoorn to Onet Village | 583.39 mi (938.88 km) |
| Hoorn to Onnaing | 168.57 mi (271.28 km) |
| Hoorn to Orange | 588.22 mi (946.65 km) |
| Hoorn to Orchies | 169.45 mi (272.70 km) |
| Hoorn to Orleans | 356.34 mi (573.47 km) |
| Hoorn to Orly | 294.11 mi (473.33 km) |
| Hoorn to Ormesson-sur-Marne | 288.95 mi (465.02 km) |
| Hoorn to Orsay | 300.69 mi (483.91 km) |
