| Melbourne to Orbetello | 5,026.16 mi (8,088.83 km) |
| Melbourne to Oria | 5,384.03 mi (8,664.76 km) |
| Melbourne to Oristano | 4,966.22 mi (7,992.36 km) |
| Melbourne to Orta Nova | 5,268.66 mi (8,479.09 km) |
| Melbourne to Orte | 5,080.69 mi (8,176.59 km) |
| Melbourne to Ortona | 5,177.71 mi (8,332.72 km) |
| Melbourne to Orvieto | 5,060.78 mi (8,144.54 km) |
| Melbourne to Orzinuovi | 4,891.14 mi (7,871.53 km) |
| Melbourne to Osimo | 5,103.40 mi (8,213.13 km) |
| Melbourne to Ospitaletto | 4,893.64 mi (7,875.55 km) |
| Melbourne to Ostuni | 5,374.43 mi (8,649.31 km) |
| Melbourne to Ottaviano | 5,224.68 mi (8,408.31 km) |
| Melbourne to Ovada | 4,850.88 mi (7,806.73 km) |
| Melbourne to Ozieri | 4,968.88 mi (7,996.64 km) |
| Melbourne to Paceco | 5,214.03 mi (8,391.17 km) |
