| Altoona to Smolyan | 5,003.01 mi (8,051.57 km) |
| Altoona to Sofia | 4,900.05 mi (7,885.87 km) |
| Altoona to Sopot | 4,958.72 mi (7,980.29 km) |
| Altoona to Sozopol | 5,084.73 mi (8,183.08 km) |
| Altoona to Sredets | 5,068.24 mi (8,156.54 km) |
| Altoona to Stamboliyski | 4,972.47 mi (8,002.41 km) |
| Altoona to Stara Zagora | 5,003.73 mi (8,052.73 km) |
| Altoona to Svilengrad | 5,054.80 mi (8,134.91 km) |
| Altoona to Svishtov | 4,940.42 mi (7,950.84 km) |
| Altoona to Targovishte | 5,004.38 mi (8,053.76 km) |
| Altoona to Teteven | 4,928.07 mi (7,930.96 km) |
| Altoona to Troyan | 4,947.31 mi (7,961.93 km) |
| Altoona to Tryavna | 4,978.89 mi (8,012.74 km) |
| Altoona to Tutrakan | 4,970.49 mi (7,999.23 km) |
| Altoona to Varna | 5,057.29 mi (8,138.93 km) |
