| Langley Park to Smolyan | 5,012.67 mi (8,067.11 km) |
| Langley Park to Sofia | 4,910.33 mi (7,902.41 km) |
| Langley Park to Sopot | 4,970.41 mi (7,999.11 km) |
| Langley Park to Sozopol | 5,099.18 mi (8,206.34 km) |
| Langley Park to Sredets | 5,082.02 mi (8,178.73 km) |
| Langley Park to Stamboliyski | 4,982.96 mi (8,019.31 km) |
| Langley Park to Stara Zagora | 5,015.99 mi (8,072.45 km) |
| Langley Park to Svilengrad | 5,066.42 mi (8,153.62 km) |
| Langley Park to Svishtov | 4,954.55 mi (7,973.58 km) |
| Langley Park to Targovishte | 5,019.13 mi (8,077.52 km) |
| Langley Park to Teteven | 4,939.75 mi (7,949.76 km) |
| Langley Park to Troyan | 4,959.41 mi (7,981.39 km) |
| Langley Park to Tryavna | 4,991.78 mi (8,033.50 km) |
| Langley Park to Tutrakan | 4,986.75 mi (8,025.41 km) |
| Langley Park to Varna | 5,073.42 mi (8,164.88 km) |
