| Surdulica to Smolyan | 150.78 mi (242.66 km) |
| Surdulica to Sofia | 59.05 mi (95.03 km) |
| Surdulica to Sopot | 131.24 mi (211.21 km) |
| Surdulica to Sozopol | 282.20 mi (454.16 km) |
| Surdulica to Sredets | 257.35 mi (414.17 km) |
| Surdulica to Stamboliyski | 126.78 mi (204.03 km) |
| Surdulica to Stara Zagora | 178.14 mi (286.69 km) |
| Surdulica to Svilengrad | 216.03 mi (347.67 km) |
| Surdulica to Svishtov | 172.59 mi (277.75 km) |
| Surdulica to Targovishte | 226.49 mi (364.51 km) |
| Surdulica to Teteven | 107.52 mi (173.04 km) |
| Surdulica to Troyan | 129.92 mi (209.09 km) |
| Surdulica to Tryavna | 169.42 mi (272.65 km) |
| Surdulica to Tutrakan | 242.25 mi (389.86 km) |
| Surdulica to Varna | 292.91 mi (471.39 km) |
