| Owensboro to Smolyan | 5,475.25 mi (8,811.56 km) |
| Owensboro to Sofia | 5,371.62 mi (8,644.79 km) |
| Owensboro to Sopot | 5,428.24 mi (8,735.90 km) |
| Owensboro to Sozopol | 5,550.00 mi (8,931.87 km) |
| Owensboro to Sredets | 5,534.53 mi (8,906.97 km) |
| Owensboro to Stamboliyski | 5,443.62 mi (8,760.65 km) |
| Owensboro to Stara Zagora | 5,472.37 mi (8,806.93 km) |
| Owensboro to Svilengrad | 5,524.22 mi (8,890.37 km) |
| Owensboro to Svishtov | 5,406.47 mi (8,700.88 km) |
| Owensboro to Targovishte | 5,469.36 mi (8,802.09 km) |
| Owensboro to Teteven | 5,397.67 mi (8,686.70 km) |
| Owensboro to Troyan | 5,416.29 mi (8,716.68 km) |
| Owensboro to Tryavna | 5,446.65 mi (8,765.54 km) |
| Owensboro to Tutrakan | 5,433.27 mi (8,744.01 km) |
| Owensboro to Varna | 5,520.09 mi (8,883.72 km) |
