| Butte to Smolyan | 5,846.70 mi (9,409.36 km) |
| Butte to Sofia | 5,745.32 mi (9,246.20 km) |
| Butte to Sopot | 5,783.00 mi (9,306.85 km) |
| Butte to Sozopol | 5,866.38 mi (9,441.03 km) |
| Butte to Sredets | 5,859.07 mi (9,429.26 km) |
| Butte to Stamboliyski | 5,809.18 mi (9,348.97 km) |
| Butte to Stara Zagora | 5,817.74 mi (9,362.74 km) |
| Butte to Svilengrad | 5,871.61 mi (9,449.45 km) |
| Butte to Svishtov | 5,738.36 mi (9,235.00 km) |
| Butte to Targovishte | 5,789.47 mi (9,317.25 km) |
| Butte to Teteven | 5,755.13 mi (9,261.99 km) |
| Butte to Troyan | 5,768.01 mi (9,282.72 km) |
| Butte to Tryavna | 5,787.68 mi (9,314.37 km) |
| Butte to Tutrakan | 5,741.07 mi (9,239.36 km) |
| Butte to Varna | 5,821.77 mi (9,369.23 km) |
