| Alloa to Smolyan | 1,619.38 mi (2,606.14 km) |
| Alloa to Sofia | 1,515.08 mi (2,438.29 km) |
| Alloa to Sopot | 1,567.07 mi (2,521.95 km) |
| Alloa to Sozopol | 1,683.55 mi (2,709.41 km) |
| Alloa to Sredets | 1,668.86 mi (2,685.77 km) |
| Alloa to Stamboliyski | 1,585.52 mi (2,551.64 km) |
| Alloa to Stara Zagora | 1,609.58 mi (2,590.37 km) |
| Alloa to Svilengrad | 1,662.40 mi (2,675.37 km) |
| Alloa to Svishtov | 1,540.85 mi (2,479.76 km) |
| Alloa to Targovishte | 1,602.83 mi (2,579.51 km) |
| Alloa to Teteven | 1,536.81 mi (2,473.25 km) |
| Alloa to Troyan | 1,554.28 mi (2,501.37 km) |
| Alloa to Tryavna | 1,582.78 mi (2,547.24 km) |
| Alloa to Tutrakan | 1,565.92 mi (2,520.10 km) |
| Alloa to Varna | 1,652.71 mi (2,659.78 km) |
