| Martinsburg to Smolyan | 5,032.71 mi (8,099.36 km) |
| Martinsburg to Sofia | 4,930.07 mi (7,934.18 km) |
| Martinsburg to Sopot | 4,989.51 mi (8,029.84 km) |
| Martinsburg to Sozopol | 5,117.02 mi (8,235.05 km) |
| Martinsburg to Sredets | 5,100.17 mi (8,207.93 km) |
| Martinsburg to Stamboliyski | 5,002.62 mi (8,050.93 km) |
| Martinsburg to Stara Zagora | 5,034.83 mi (8,102.78 km) |
| Martinsburg to Svilengrad | 5,085.57 mi (8,184.43 km) |
| Martinsburg to Svishtov | 4,972.52 mi (8,002.50 km) |
| Martinsburg to Targovishte | 5,036.82 mi (8,105.98 km) |
| Martinsburg to Teteven | 4,958.85 mi (7,980.50 km) |
| Martinsburg to Troyan | 4,978.32 mi (8,011.83 km) |
| Martinsburg to Tryavna | 5,010.33 mi (8,063.34 km) |
| Martinsburg to Tutrakan | 5,003.73 mi (8,052.73 km) |
| Martinsburg to Varna | 5,090.48 mi (8,192.33 km) |
