| Montgomery to Smolyan | 5,706.25 mi (9,183.32 km) |
| Montgomery to Sofia | 5,603.83 mi (9,018.49 km) |
| Montgomery to Sopot | 5,663.67 mi (9,114.80 km) |
| Montgomery to Sozopol | 5,791.76 mi (9,320.94 km) |
| Montgomery to Sredets | 5,774.80 mi (9,293.64 km) |
| Montgomery to Stamboliyski | 5,676.43 mi (9,135.34 km) |
| Montgomery to Stara Zagora | 5,709.14 mi (9,187.97 km) |
| Montgomery to Svilengrad | 5,759.71 mi (9,269.35 km) |
| Montgomery to Svishtov | 5,647.21 mi (9,088.31 km) |
| Montgomery to Targovishte | 5,711.61 mi (9,191.95 km) |
| Montgomery to Teteven | 5,633.01 mi (9,065.45 km) |
| Montgomery to Troyan | 5,652.58 mi (9,096.96 km) |
| Montgomery to Tryavna | 5,684.78 mi (9,148.77 km) |
| Montgomery to Tutrakan | 5,678.70 mi (9,138.98 km) |
| Montgomery to Varna | 5,765.43 mi (9,278.56 km) |
