| Bowling Green to Oerlinghausen | 4,459.14 mi (7,176.29 km) |
| Bowling Green to Oestrich-Winkel | 4,498.23 mi (7,239.20 km) |
| Bowling Green to Offenburg | 4,546.74 mi (7,317.28 km) |
| Bowling Green to Oftersheim | 4,542.12 mi (7,309.84 km) |
| Bowling Green to Ohrdruf | 4,575.21 mi (7,363.09 km) |
| Bowling Green to Ohringen | 4,583.83 mi (7,376.96 km) |
| Bowling Green to Olbernhau | 4,678.54 mi (7,529.38 km) |
| Bowling Green to Olching | 4,690.29 mi (7,548.30 km) |
| Bowling Green to Oldenburg | 4,404.39 mi (7,088.17 km) |
| Bowling Green to Oldenburg in Holstein | 4,463.17 mi (7,182.78 km) |
| Bowling Green to Olfen | 4,418.75 mi (7,111.29 km) |
| Bowling Green to Olpe | 4,458.46 mi (7,175.19 km) |
| Bowling Green to Olsberg | 4,472.39 mi (7,197.62 km) |
| Bowling Green to Oranienburg | 4,600.10 mi (7,403.15 km) |
| Bowling Green to Ortenberg | 4,527.28 mi (7,285.95 km) |
