| Louisville to Popovo | 5,376.31 mi (8,652.33 km) |
| Louisville to Provadia | 5,428.83 mi (8,736.86 km) |
| Louisville to Radnevo | 5,413.24 mi (8,711.76 km) |
| Louisville to Radomir | 5,286.84 mi (8,508.35 km) |
| Louisville to Rakitovo | 5,356.35 mi (8,620.22 km) |
| Louisville to Rakovski | 5,376.69 mi (8,652.94 km) |
| Louisville to Razgrad | 5,378.47 mi (8,655.81 km) |
| Louisville to Razlog | 5,336.77 mi (8,588.69 km) |
| Louisville to Ruse | 5,344.15 mi (8,600.58 km) |
| Louisville to Samokov | 5,319.92 mi (8,561.58 km) |
| Louisville to Sandanski | 5,343.62 mi (8,599.73 km) |
| Louisville to Sevlievo | 5,348.83 mi (8,608.11 km) |
| Louisville to Shumen | 5,405.57 mi (8,699.42 km) |
| Louisville to Silistra | 5,379.00 mi (8,656.67 km) |
| Louisville to Sliven | 5,410.78 mi (8,707.81 km) |
