| Perth Amboy to Orbetello | 4,224.69 mi (6,798.99 km) |
| Perth Amboy to Oria | 4,577.49 mi (7,366.75 km) |
| Perth Amboy to Oristano | 4,194.56 mi (6,750.50 km) |
| Perth Amboy to Orta Nova | 4,462.10 mi (7,181.06 km) |
| Perth Amboy to Orte | 4,275.59 mi (6,880.90 km) |
| Perth Amboy to Ortona | 4,367.47 mi (7,028.77 km) |
| Perth Amboy to Orvieto | 4,254.45 mi (6,846.88 km) |
| Perth Amboy to Orzinuovi | 4,069.74 mi (6,549.62 km) |
| Perth Amboy to Osimo | 4,287.26 mi (6,899.67 km) |
| Perth Amboy to Ospitaletto | 4,070.70 mi (6,551.16 km) |
| Perth Amboy to Ostuni | 4,566.33 mi (7,348.80 km) |
| Perth Amboy to Ottaviano | 4,425.76 mi (7,122.56 km) |
| Perth Amboy to Ovada | 4,038.72 mi (6,499.69 km) |
| Perth Amboy to Ozieri | 4,189.86 mi (6,742.92 km) |
| Perth Amboy to Paceco | 4,445.29 mi (7,154.01 km) |
