| Leiden to Octeville | 319.33 mi (513.91 km) |
| Leiden to Oignies | 133.50 mi (214.85 km) |
| Leiden to Oissel | 244.86 mi (394.07 km) |
| Leiden to Olivet | 318.27 mi (512.20 km) |
| Leiden to Ollioules | 626.42 mi (1,008.13 km) |
| Leiden to Olonne-sur-Mer | 479.67 mi (771.96 km) |
| Leiden to Oloron-Sainte-Marie | 662.89 mi (1,066.81 km) |
| Leiden to Onet Village | 545.51 mi (877.91 km) |
| Leiden to Onnaing | 128.37 mi (206.59 km) |
| Leiden to Orange | 554.44 mi (892.29 km) |
| Leiden to Orchies | 128.27 mi (206.42 km) |
| Leiden to Orleans | 315.63 mi (507.96 km) |
| Leiden to Orly | 253.39 mi (407.80 km) |
| Leiden to Ormesson-sur-Marne | 248.41 mi (399.77 km) |
| Leiden to Orsay | 259.74 mi (418.02 km) |
