| Thornbury to Smolyan | 1,454.40 mi (2,340.64 km) |
| Thornbury to Sofia | 1,351.96 mi (2,175.76 km) |
| Thornbury to Sopot | 1,412.53 mi (2,273.25 km) |
| Thornbury to Sozopol | 1,544.74 mi (2,486.01 km) |
| Thornbury to Sredets | 1,526.44 mi (2,456.57 km) |
| Thornbury to Stamboliyski | 1,424.60 mi (2,292.67 km) |
| Thornbury to Stara Zagora | 1,458.53 mi (2,347.28 km) |
| Thornbury to Svilengrad | 1,508.44 mi (2,427.60 km) |
| Thornbury to Svishtov | 1,399.97 mi (2,253.03 km) |
| Thornbury to Targovishte | 1,465.62 mi (2,358.68 km) |
| Thornbury to Teteven | 1,381.88 mi (2,223.92 km) |
| Thornbury to Troyan | 1,401.86 mi (2,256.08 km) |
| Thornbury to Tryavna | 1,435.08 mi (2,309.54 km) |
| Thornbury to Tutrakan | 1,437.32 mi (2,313.14 km) |
| Thornbury to Varna | 1,523.04 mi (2,451.09 km) |
