| Louisville to Smolyan | 5,398.47 mi (8,687.99 km) |
| Louisville to Sofia | 5,294.95 mi (8,521.41 km) |
| Louisville to Sopot | 5,351.99 mi (8,613.20 km) |
| Louisville to Sozopol | 5,474.63 mi (8,810.56 km) |
| Louisville to Sredets | 5,458.95 mi (8,785.34 km) |
| Louisville to Stamboliyski | 5,367.05 mi (8,637.43 km) |
| Louisville to Stara Zagora | 5,396.31 mi (8,684.52 km) |
| Louisville to Svilengrad | 5,448.01 mi (8,767.72 km) |
| Louisville to Svishtov | 5,330.92 mi (8,579.28 km) |
| Louisville to Targovishte | 5,394.03 mi (8,680.85 km) |
| Louisville to Teteven | 5,321.40 mi (8,563.97 km) |
| Louisville to Troyan | 5,340.15 mi (8,594.14 km) |
| Louisville to Tryavna | 5,370.76 mi (8,643.41 km) |
| Louisville to Tutrakan | 5,358.37 mi (8,623.46 km) |
| Louisville to Varna | 5,445.20 mi (8,763.20 km) |
