| Bowling Green to Orbetello | 4,898.16 mi (7,882.82 km) |
| Bowling Green to Oria | 5,247.15 mi (8,444.47 km) |
| Bowling Green to Oristano | 4,878.25 mi (7,850.78 km) |
| Bowling Green to Orta Nova | 5,132.31 mi (8,259.66 km) |
| Bowling Green to Orte | 4,947.32 mi (7,961.94 km) |
| Bowling Green to Ortona | 5,036.53 mi (8,105.52 km) |
| Bowling Green to Orvieto | 4,925.77 mi (7,927.27 km) |
| Bowling Green to Orzinuovi | 4,735.13 mi (7,620.45 km) |
| Bowling Green to Osimo | 4,954.01 mi (7,972.71 km) |
| Bowling Green to Ospitaletto | 4,735.31 mi (7,620.75 km) |
| Bowling Green to Ostuni | 5,235.36 mi (8,425.51 km) |
| Bowling Green to Ottaviano | 5,099.29 mi (8,206.51 km) |
| Bowling Green to Ovada | 4,708.60 mi (7,577.76 km) |
| Bowling Green to Ozieri | 4,871.38 mi (7,839.73 km) |
| Bowling Green to Paceco | 5,128.88 mi (8,254.13 km) |
