| Challans to Smolyan | 1,358.19 mi (2,185.80 km) |
| Challans to Sofia | 1,263.30 mi (2,033.08 km) |
| Challans to Sopot | 1,331.57 mi (2,142.95 km) |
| Challans to Sozopol | 1,476.91 mi (2,376.86 km) |
| Challans to Sredets | 1,455.03 mi (2,341.65 km) |
| Challans to Stamboliyski | 1,334.98 mi (2,148.44 km) |
| Challans to Stara Zagora | 1,379.66 mi (2,220.34 km) |
| Challans to Svilengrad | 1,423.62 mi (2,291.10 km) |
| Challans to Svishtov | 1,336.58 mi (2,151.02 km) |
| Challans to Targovishte | 1,403.37 mi (2,258.51 km) |
| Challans to Teteven | 1,302.02 mi (2,095.40 km) |
| Challans to Troyan | 1,324.10 mi (2,130.93 km) |
| Challans to Tryavna | 1,361.50 mi (2,191.13 km) |
| Challans to Tutrakan | 1,386.87 mi (2,231.96 km) |
| Challans to Varna | 1,467.17 mi (2,361.19 km) |
