| Erie to Orbetello | 4,413.59 mi (7,102.99 km) |
| Erie to Oria | 4,760.91 mi (7,661.94 km) |
| Erie to Oristano | 4,399.38 mi (7,080.11 km) |
| Erie to Orta Nova | 4,646.34 mi (7,477.56 km) |
| Erie to Orte | 4,462.03 mi (7,180.94 km) |
| Erie to Ortona | 4,550.23 mi (7,322.89 km) |
| Erie to Orvieto | 4,440.34 mi (7,146.04 km) |
| Erie to Orzinuovi | 4,247.90 mi (6,836.34 km) |
| Erie to Osimo | 4,467.04 mi (7,189.01 km) |
| Erie to Ospitaletto | 4,247.88 mi (6,836.30 km) |
| Erie to Ostuni | 4,748.92 mi (7,642.65 km) |
| Erie to Ottaviano | 4,614.60 mi (7,426.48 km) |
| Erie to Ovada | 4,222.82 mi (6,795.97 km) |
| Erie to Ozieri | 4,391.04 mi (7,066.69 km) |
| Erie to Paceco | 4,649.68 mi (7,482.94 km) |
