| Butler to Smolyan | 5,046.75 mi (8,121.96 km) |
| Butler to Sofia | 4,943.50 mi (7,955.79 km) |
| Butler to Sopot | 5,001.37 mi (8,048.93 km) |
| Butler to Sozopol | 5,125.81 mi (8,249.19 km) |
| Butler to Sredets | 5,109.70 mi (8,223.26 km) |
| Butler to Stamboliyski | 5,015.77 mi (8,072.09 km) |
| Butler to Stara Zagora | 5,046.06 mi (8,120.85 km) |
| Butler to Svilengrad | 5,097.44 mi (8,203.54 km) |
| Butler to Svishtov | 4,981.75 mi (8,017.35 km) |
| Butler to Targovishte | 5,045.32 mi (8,119.67 km) |
| Butler to Teteven | 4,970.75 mi (7,999.65 km) |
| Butler to Troyan | 4,989.76 mi (8,030.24 km) |
| Butler to Tryavna | 5,020.87 mi (8,080.31 km) |
| Butler to Tutrakan | 5,010.62 mi (8,063.81 km) |
| Butler to Varna | 5,097.45 mi (8,203.56 km) |
