| Hamm to Octeville | 437.68 mi (704.38 km) |
| Hamm to Oignies | 225.50 mi (362.90 km) |
| Hamm to Oissel | 336.69 mi (541.85 km) |
| Hamm to Olivet | 373.04 mi (600.35 km) |
| Hamm to Ollioules | 597.41 mi (961.43 km) |
| Hamm to Olonne-sur-Mer | 560.10 mi (901.40 km) |
| Hamm to Oloron-Sainte-Marie | 705.37 mi (1,135.18 km) |
| Hamm to Onet Village | 559.91 mi (901.08 km) |
| Hamm to Onnaing | 203.94 mi (328.21 km) |
| Hamm to Orange | 539.47 mi (868.19 km) |
| Hamm to Orchies | 215.28 mi (346.47 km) |
| Hamm to Orleans | 370.82 mi (596.78 km) |
| Hamm to Orly | 314.11 mi (505.51 km) |
| Hamm to Ormesson-sur-Marne | 307.27 mi (494.50 km) |
| Hamm to Orsay | 323.18 mi (520.11 km) |
