| Melzo to Octeville | 588.39 mi (946.93 km) |
| Melzo to Oignies | 453.66 mi (730.09 km) |
| Melzo to Oissel | 470.68 mi (757.48 km) |
| Melzo to Olivet | 391.70 mi (630.39 km) |
| Melzo to Ollioules | 240.25 mi (386.65 km) |
| Melzo to Olonne-sur-Mer | 541.16 mi (870.91 km) |
| Melzo to Oloron-Sainte-Marie | 519.83 mi (836.59 km) |
| Melzo to Onet Village | 342.71 mi (551.53 km) |
| Melzo to Onnaing | 431.66 mi (694.69 km) |
| Melzo to Orange | 244.56 mi (393.58 km) |
| Melzo to Orchies | 446.47 mi (718.52 km) |
| Melzo to Orleans | 392.34 mi (631.42 km) |
| Melzo to Orly | 398.84 mi (641.88 km) |
| Melzo to Ormesson-sur-Marne | 394.76 mi (635.31 km) |
| Melzo to Orsay | 405.24 mi (652.18 km) |
