| Bletchley to Smolyan | 1,390.94 mi (2,238.50 km) |
| Bletchley to Sofia | 1,287.83 mi (2,072.57 km) |
| Bletchley to Sopot | 1,346.92 mi (2,167.66 km) |
| Bletchley to Sozopol | 1,476.68 mi (2,376.49 km) |
| Bletchley to Sredets | 1,458.95 mi (2,347.96 km) |
| Bletchley to Stamboliyski | 1,360.24 mi (2,189.10 km) |
| Bletchley to Stara Zagora | 1,392.40 mi (2,240.85 km) |
| Bletchley to Svilengrad | 1,442.97 mi (2,322.23 km) |
| Bletchley to Svishtov | 1,331.90 mi (2,143.49 km) |
| Bletchley to Targovishte | 1,397.11 mi (2,248.44 km) |
| Bletchley to Teteven | 1,316.26 mi (2,118.32 km) |
| Bletchley to Troyan | 1,335.83 mi (2,149.81 km) |
| Bletchley to Tryavna | 1,368.29 mi (2,202.05 km) |
| Bletchley to Tutrakan | 1,367.38 mi (2,200.59 km) |
| Bletchley to Varna | 1,453.47 mi (2,339.14 km) |
