| Princeton to Orbetello | 5,126.93 mi (8,251.00 km) |
| Princeton to Oria | 5,485.20 mi (8,827.58 km) |
| Princeton to Oristano | 5,058.58 mi (8,141.01 km) |
| Princeton to Orta Nova | 5,370.19 mi (8,642.48 km) |
| Princeton to Orte | 5,182.37 mi (8,340.22 km) |
| Princeton to Ortona | 5,280.64 mi (8,498.37 km) |
| Princeton to Orvieto | 5,162.89 mi (8,308.87 km) |
| Princeton to Orzinuovi | 4,998.38 mi (8,044.12 km) |
| Princeton to Osimo | 5,208.37 mi (8,382.07 km) |
| Princeton to Ospitaletto | 5,001.35 mi (8,048.90 km) |
| Princeton to Ostuni | 5,476.11 mi (8,812.94 km) |
| Princeton to Ottaviano | 5,324.05 mi (8,568.22 km) |
| Princeton to Ovada | 4,955.42 mi (7,974.97 km) |
| Princeton to Ozieri | 5,063.32 mi (8,148.62 km) |
| Princeton to Paceco | 5,304.66 mi (8,537.03 km) |
