| Louisville to Olivares | 4,194.42 mi (6,750.27 km) |
| Louisville to Olivenza | 4,108.47 mi (6,611.94 km) |
| Louisville to Olot | 4,441.73 mi (7,148.27 km) |
| Louisville to Onate | 4,193.75 mi (6,749.18 km) |
| Louisville to Onda | 4,391.00 mi (7,066.64 km) |
| Louisville to Onteniente | 4,413.29 mi (7,102.51 km) |
| Louisville to Orihuela | 4,422.21 mi (7,116.86 km) |
| Louisville to Osuna | 4,251.36 mi (6,841.90 km) |
| Louisville to Ourense | 3,964.22 mi (6,379.80 km) |
| Louisville to Oviedo | 4,028.19 mi (6,482.74 km) |
| Louisville to Paiporta | 4,401.74 mi (7,083.91 km) |
| Louisville to Pajara | 4,088.54 mi (6,579.86 km) |
| Louisville to Palafolls | 4,470.87 mi (7,195.17 km) |
| Louisville to Palafrugell | 4,480.84 mi (7,211.21 km) |
| Louisville to Palamos | 4,481.77 mi (7,212.71 km) |
