| Serta to Smolyan | 1,712.41 mi (2,755.86 km) |
| Serta to Sofia | 1,635.40 mi (2,631.92 km) |
| Serta to Sopot | 1,707.59 mi (2,748.11 km) |
| Serta to Sozopol | 1,858.64 mi (2,991.19 km) |
| Serta to Sredets | 1,833.82 mi (2,951.24 km) |
| Serta to Stamboliyski | 1,699.75 mi (2,735.49 km) |
| Serta to Stara Zagora | 1,754.55 mi (2,823.68 km) |
| Serta to Svilengrad | 1,787.69 mi (2,877.01 km) |
| Serta to Svishtov | 1,733.44 mi (2,789.70 km) |
| Serta to Targovishte | 1,796.80 mi (2,891.66 km) |
| Serta to Teteven | 1,681.81 mi (2,706.61 km) |
| Serta to Troyan | 1,704.69 mi (2,743.44 km) |
| Serta to Tryavna | 1,744.33 mi (2,807.22 km) |
| Serta to Tutrakan | 1,795.03 mi (2,888.83 km) |
| Serta to Varna | 1,863.88 mi (2,999.62 km) |
