| Springfield to Smolyan | 4,695.90 mi (7,557.32 km) |
| Springfield to Sofia | 4,593.44 mi (7,392.42 km) |
| Springfield to Sopot | 4,653.28 mi (7,488.74 km) |
| Springfield to Sozopol | 4,781.71 mi (7,695.42 km) |
| Springfield to Sredets | 4,764.62 mi (7,667.92 km) |
| Springfield to Stamboliyski | 4,666.04 mi (7,509.26 km) |
| Springfield to Stara Zagora | 4,698.78 mi (7,561.96 km) |
| Springfield to Svilengrad | 4,749.31 mi (7,643.28 km) |
| Springfield to Svishtov | 4,637.11 mi (7,462.70 km) |
| Springfield to Targovishte | 4,701.63 mi (7,566.54 km) |
| Springfield to Teteven | 4,622.62 mi (7,439.39 km) |
| Springfield to Troyan | 4,642.22 mi (7,470.93 km) |
| Springfield to Tryavna | 4,674.48 mi (7,522.85 km) |
| Springfield to Tutrakan | 4,669.13 mi (7,514.24 km) |
| Springfield to Varna | 4,755.81 mi (7,653.73 km) |
