| Perth to Orbetello | 1,162.29 mi (1,870.53 km) |
| Perth to Oria | 1,450.38 mi (2,334.15 km) |
| Perth to Oristano | 1,262.79 mi (2,032.27 km) |
| Perth to Orta Nova | 1,347.26 mi (2,168.20 km) |
| Perth to Orte | 1,190.75 mi (1,916.32 km) |
| Perth to Ortona | 1,251.44 mi (2,014.00 km) |
| Perth to Orvieto | 1,168.26 mi (1,880.14 km) |
| Perth to Orzinuovi | 953.82 mi (1,535.03 km) |
| Perth to Osimo | 1,160.54 mi (1,867.71 km) |
| Perth to Ospitaletto | 948.46 mi (1,526.40 km) |
| Perth to Ostuni | 1,435.53 mi (2,310.26 km) |
| Perth to Ottaviano | 1,341.54 mi (2,159.01 km) |
| Perth to Ovada | 967.20 mi (1,556.56 km) |
| Perth to Ozieri | 1,227.60 mi (1,975.64 km) |
| Perth to Paceco | 1,468.94 mi (2,364.02 km) |
