| Katwijk to Octeville | 318.10 mi (511.94 km) |
| Katwijk to Oignies | 134.44 mi (216.35 km) |
| Katwijk to Oissel | 245.12 mi (394.48 km) |
| Katwijk to Olivet | 319.68 mi (514.48 km) |
| Katwijk to Ollioules | 629.52 mi (1,013.11 km) |
| Katwijk to Olonne-sur-Mer | 479.93 mi (772.38 km) |
| Katwijk to Oloron-Sainte-Marie | 664.24 mi (1,068.99 km) |
| Katwijk to Onet Village | 547.71 mi (881.45 km) |
| Katwijk to Onnaing | 130.11 mi (209.39 km) |
| Katwijk to Orange | 557.30 mi (896.89 km) |
| Katwijk to Orchies | 129.50 mi (208.41 km) |
| Katwijk to Orleans | 317.04 mi (510.22 km) |
| Katwijk to Orly | 254.81 mi (410.08 km) |
| Katwijk to Ormesson-sur-Marne | 249.91 mi (402.19 km) |
| Katwijk to Orsay | 261.05 mi (420.11 km) |
