| Preston to Smolyan | 1,512.46 mi (2,434.06 km) |
| Preston to Sofia | 1,408.58 mi (2,266.90 km) |
| Preston to Sopot | 1,464.92 mi (2,357.55 km) |
| Preston to Sozopol | 1,589.52 mi (2,558.08 km) |
| Preston to Sredets | 1,573.01 mi (2,531.52 km) |
| Preston to Stamboliyski | 1,480.39 mi (2,382.45 km) |
| Preston to Stara Zagora | 1,509.30 mi (2,428.98 km) |
| Preston to Svilengrad | 1,560.93 mi (2,512.07 km) |
| Preston to Svishtov | 1,445.17 mi (2,325.78 km) |
| Preston to Targovishte | 1,509.23 mi (2,428.87 km) |
| Preston to Teteven | 1,434.33 mi (2,308.33 km) |
| Preston to Troyan | 1,453.09 mi (2,338.52 km) |
| Preston to Tryavna | 1,484.00 mi (2,388.26 km) |
| Preston to Tutrakan | 1,476.36 mi (2,375.97 km) |
| Preston to Varna | 1,563.03 mi (2,515.45 km) |
