| Wealdstone to Smolyan | 1,365.31 mi (2,197.26 km) |
| Wealdstone to Sofia | 1,262.46 mi (2,031.73 km) |
| Wealdstone to Sopot | 1,322.20 mi (2,127.88 km) |
| Wealdstone to Sozopol | 1,453.16 mi (2,338.64 km) |
| Wealdstone to Sredets | 1,435.14 mi (2,309.64 km) |
| Wealdstone to Stamboliyski | 1,334.98 mi (2,148.44 km) |
| Wealdstone to Stara Zagora | 1,367.93 mi (2,201.47 km) |
| Wealdstone to Svilengrad | 1,418.20 mi (2,282.37 km) |
| Wealdstone to Svishtov | 1,308.37 mi (2,105.62 km) |
| Wealdstone to Targovishte | 1,373.82 mi (2,210.95 km) |
| Wealdstone to Teteven | 1,291.54 mi (2,078.53 km) |
| Wealdstone to Troyan | 1,311.30 mi (2,110.34 km) |
| Wealdstone to Tryavna | 1,344.12 mi (2,163.16 km) |
| Wealdstone to Tutrakan | 1,344.88 mi (2,164.38 km) |
| Wealdstone to Varna | 1,430.77 mi (2,302.60 km) |
