| Port Angeles to Orbetello | 5,598.33 mi (9,009.64 km) |
| Port Angeles to Oria | 5,867.77 mi (9,443.27 km) |
| Port Angeles to Oristano | 5,683.99 mi (9,147.50 km) |
| Port Angeles to Orta Nova | 5,772.79 mi (9,290.41 km) |
| Port Angeles to Orte | 5,625.51 mi (9,053.38 km) |
| Port Angeles to Ortona | 5,679.67 mi (9,140.54 km) |
| Port Angeles to Orvieto | 5,603.17 mi (9,017.44 km) |
| Port Angeles to Orzinuovi | 5,388.74 mi (8,672.33 km) |
| Port Angeles to Osimo | 5,588.82 mi (8,994.34 km) |
| Port Angeles to Ospitaletto | 5,382.78 mi (8,662.74 km) |
| Port Angeles to Ostuni | 5,852.05 mi (9,417.97 km) |
| Port Angeles to Ottaviano | 5,773.97 mi (9,292.30 km) |
| Port Angeles to Ovada | 5,402.73 mi (8,694.86 km) |
| Port Angeles to Ozieri | 5,654.16 mi (9,099.49 km) |
| Port Angeles to Paceco | 5,902.98 mi (9,499.93 km) |
