| Melgaco to Orbetello | 993.87 mi (1,599.47 km) |
| Melgaco to Oria | 1,343.69 mi (2,162.46 km) |
| Melgaco to Oristano | 890.58 mi (1,433.25 km) |
| Melgaco to Orta Nova | 1,233.65 mi (1,985.37 km) |
| Melgaco to Orte | 1,053.28 mi (1,695.09 km) |
| Melgaco to Ortona | 1,156.24 mi (1,860.79 km) |
| Melgaco to Orvieto | 1,037.70 mi (1,670.02 km) |
| Melgaco to Orzinuovi | 933.91 mi (1,502.99 km) |
| Melgaco to Osimo | 1,103.51 mi (1,775.93 km) |
| Melgaco to Ospitaletto | 942.09 mi (1,516.15 km) |
| Melgaco to Ostuni | 1,337.52 mi (2,152.52 km) |
| Melgaco to Ottaviano | 1,177.02 mi (1,894.24 km) |
| Melgaco to Ovada | 865.39 mi (1,392.71 km) |
| Melgaco to Ozieri | 900.41 mi (1,449.06 km) |
| Melgaco to Paceco | 1,134.26 mi (1,825.42 km) |
