| Springfield to Orbetello | 4,089.95 mi (6,582.13 km) |
| Springfield to Oria | 4,441.92 mi (7,148.58 km) |
| Springfield to Oristano | 4,063.02 mi (6,538.79 km) |
| Springfield to Orta Nova | 4,326.63 mi (6,963.04 km) |
| Springfield to Orte | 4,140.43 mi (6,663.37 km) |
| Springfield to Ortona | 4,231.72 mi (6,810.30 km) |
| Springfield to Orvieto | 4,119.19 mi (6,629.19 km) |
| Springfield to Orzinuovi | 3,933.15 mi (6,329.79 km) |
| Springfield to Osimo | 4,151.00 mi (6,680.38 km) |
| Springfield to Ospitaletto | 3,933.96 mi (6,331.09 km) |
| Springfield to Ostuni | 4,430.62 mi (7,130.40 km) |
| Springfield to Ottaviano | 4,291.08 mi (6,905.82 km) |
| Springfield to Ovada | 3,903.06 mi (6,281.37 km) |
| Springfield to Ozieri | 4,057.51 mi (6,529.93 km) |
| Springfield to Paceco | 4,313.76 mi (6,942.32 km) |
