| Ashburn to Smolyan | 5,031.17 mi (8,096.89 km) |
| Ashburn to Sofia | 4,928.74 mi (7,932.04 km) |
| Ashburn to Sopot | 4,988.61 mi (8,028.40 km) |
| Ashburn to Sozopol | 5,116.97 mi (8,234.97 km) |
| Ashburn to Sredets | 5,099.92 mi (8,207.52 km) |
| Ashburn to Stamboliyski | 5,001.34 mi (8,048.89 km) |
| Ashburn to Stara Zagora | 5,034.11 mi (8,101.61 km) |
| Ashburn to Svilengrad | 5,084.64 mi (8,182.94 km) |
| Ashburn to Svishtov | 4,972.38 mi (8,002.28 km) |
| Ashburn to Targovishte | 5,036.88 mi (8,106.07 km) |
| Ashburn to Teteven | 4,957.95 mi (7,979.05 km) |
| Ashburn to Troyan | 4,977.55 mi (8,010.59 km) |
| Ashburn to Tryavna | 5,009.80 mi (8,062.50 km) |
| Ashburn to Tutrakan | 5,004.26 mi (8,053.58 km) |
| Ashburn to Varna | 5,090.96 mi (8,193.10 km) |
