| Southall to Smolyan | 1,365.01 mi (2,196.78 km) |
| Southall to Sofia | 1,262.24 mi (2,031.38 km) |
| Southall to Sopot | 1,322.18 mi (2,127.84 km) |
| Southall to Sozopol | 1,453.47 mi (2,339.14 km) |
| Southall to Sredets | 1,435.37 mi (2,310.01 km) |
| Southall to Stamboliyski | 1,334.79 mi (2,148.14 km) |
| Southall to Stara Zagora | 1,367.98 mi (2,201.54 km) |
| Southall to Svilengrad | 1,418.16 mi (2,282.31 km) |
| Southall to Svishtov | 1,308.68 mi (2,106.12 km) |
| Southall to Targovishte | 1,374.20 mi (2,211.56 km) |
| Southall to Teteven | 1,291.52 mi (2,078.50 km) |
| Southall to Troyan | 1,311.34 mi (2,110.39 km) |
| Southall to Tryavna | 1,344.26 mi (2,163.38 km) |
| Southall to Tutrakan | 1,345.47 mi (2,165.33 km) |
| Southall to Varna | 1,431.30 mi (2,303.46 km) |
