| Szentgotthard to Smolyan | 557.13 mi (896.61 km) |
| Szentgotthard to Sofia | 453.08 mi (729.16 km) |
| Szentgotthard to Sopot | 510.12 mi (820.96 km) |
| Szentgotthard to Sozopol | 641.63 mi (1,032.60 km) |
| Szentgotthard to Sredets | 622.97 mi (1,002.57 km) |
| Szentgotthard to Stamboliyski | 524.80 mi (844.58 km) |
| Szentgotthard to Stara Zagora | 555.46 mi (893.93 km) |
| Szentgotthard to Svilengrad | 606.19 mi (975.57 km) |
| Szentgotthard to Svishtov | 497.03 mi (799.89 km) |
| Szentgotthard to Targovishte | 563.18 mi (906.36 km) |
| Szentgotthard to Teteven | 479.47 mi (771.62 km) |
| Szentgotthard to Troyan | 498.90 mi (802.90 km) |
| Szentgotthard to Tryavna | 531.58 mi (855.50 km) |
| Szentgotthard to Tutrakan | 538.69 mi (866.94 km) |
| Szentgotthard to Varna | 622.75 mi (1,002.22 km) |
