| Towson to Smolyan | 4,979.90 mi (8,014.37 km) |
| Towson to Sofia | 4,877.51 mi (7,849.60 km) |
| Towson to Sopot | 4,937.50 mi (7,946.14 km) |
| Towson to Sozopol | 5,066.10 mi (8,153.09 km) |
| Towson to Sredets | 5,048.98 mi (8,125.55 km) |
| Towson to Stamboliyski | 4,950.14 mi (7,966.47 km) |
| Towson to Stara Zagora | 4,983.04 mi (8,019.43 km) |
| Towson to Svilengrad | 5,033.52 mi (8,100.67 km) |
| Towson to Svishtov | 4,921.48 mi (7,920.36 km) |
| Towson to Targovishte | 4,986.03 mi (8,024.24 km) |
| Towson to Teteven | 4,906.84 mi (7,896.79 km) |
| Towson to Troyan | 4,926.47 mi (7,928.39 km) |
| Towson to Tryavna | 4,958.79 mi (7,980.40 km) |
| Towson to Tutrakan | 4,953.56 mi (7,971.98 km) |
| Towson to Varna | 5,040.24 mi (8,111.48 km) |
