| Chalfont Saint Peter to Smolyan | 1,374.46 mi (2,211.99 km) |
| Chalfont Saint Peter to Sofia | 1,271.64 mi (2,046.51 km) |
| Chalfont Saint Peter to Sopot | 1,331.46 mi (2,142.78 km) |
| Chalfont Saint Peter to Sozopol | 1,462.53 mi (2,353.71 km) |
| Chalfont Saint Peter to Sredets | 1,444.48 mi (2,324.67 km) |
| Chalfont Saint Peter to Stamboliyski | 1,344.18 mi (2,163.24 km) |
| Chalfont Saint Peter to Stara Zagora | 1,377.21 mi (2,216.41 km) |
| Chalfont Saint Peter to Svilengrad | 1,427.45 mi (2,297.26 km) |
| Chalfont Saint Peter to Svishtov | 1,317.73 mi (2,120.69 km) |
| Chalfont Saint Peter to Targovishte | 1,383.20 mi (2,226.05 km) |
| Chalfont Saint Peter to Teteven | 1,300.80 mi (2,093.44 km) |
| Chalfont Saint Peter to Troyan | 1,320.58 mi (2,125.27 km) |
| Chalfont Saint Peter to Tryavna | 1,353.44 mi (2,178.15 km) |
| Chalfont Saint Peter to Tutrakan | 1,354.31 mi (2,179.55 km) |
| Chalfont Saint Peter to Varna | 1,440.19 mi (2,317.76 km) |
