| Charleston to Smolyan | 5,419.19 mi (8,721.34 km) |
| Charleston to Sofia | 5,318.12 mi (8,558.68 km) |
| Charleston to Sopot | 5,380.28 mi (8,658.72 km) |
| Charleston to Sozopol | 5,512.99 mi (8,872.30 km) |
| Charleston to Sredets | 5,494.86 mi (8,843.13 km) |
| Charleston to Stamboliyski | 5,390.91 mi (8,675.83 km) |
| Charleston to Stara Zagora | 5,426.62 mi (8,733.31 km) |
| Charleston to Svilengrad | 5,475.96 mi (8,812.71 km) |
| Charleston to Svishtov | 5,368.20 mi (8,639.28 km) |
| Charleston to Targovishte | 5,433.58 mi (8,744.51 km) |
| Charleston to Teteven | 5,349.67 mi (8,609.46 km) |
| Charleston to Troyan | 5,369.92 mi (8,642.06 km) |
| Charleston to Tryavna | 5,403.46 mi (8,696.03 km) |
| Charleston to Tutrakan | 5,403.50 mi (8,696.09 km) |
| Charleston to Varna | 5,489.79 mi (8,834.96 km) |
