| Louisville to Oerlinghausen | 4,369.35 mi (7,031.79 km) |
| Louisville to Oestrich-Winkel | 4,409.44 mi (7,096.30 km) |
| Louisville to Offenburg | 4,458.72 mi (7,175.62 km) |
| Louisville to Oftersheim | 4,453.53 mi (7,167.27 km) |
| Louisville to Ohrdruf | 4,485.60 mi (7,218.87 km) |
| Louisville to Ohringen | 4,495.16 mi (7,234.26 km) |
| Louisville to Olbernhau | 4,588.59 mi (7,384.63 km) |
| Louisville to Olching | 4,601.75 mi (7,405.81 km) |
| Louisville to Oldenburg | 4,314.17 mi (6,942.99 km) |
| Louisville to Oldenburg in Holstein | 4,372.21 mi (7,036.39 km) |
| Louisville to Olfen | 4,329.26 mi (6,967.27 km) |
| Louisville to Olpe | 4,369.22 mi (7,031.57 km) |
| Louisville to Olsberg | 4,382.90 mi (7,053.59 km) |
| Louisville to Oranienburg | 4,509.40 mi (7,257.18 km) |
| Louisville to Ortenberg | 4,438.14 mi (7,142.50 km) |
