| Caister-on-Sea to Smolyan | 1,313.85 mi (2,114.44 km) |
| Caister-on-Sea to Sofia | 1,209.94 mi (1,947.22 km) |
| Caister-on-Sea to Sopot | 1,266.22 mi (2,037.78 km) |
| Caister-on-Sea to Sozopol | 1,391.30 mi (2,239.09 km) |
| Caister-on-Sea to Sredets | 1,374.62 mi (2,212.24 km) |
| Caister-on-Sea to Stamboliyski | 1,281.71 mi (2,062.71 km) |
| Caister-on-Sea to Stara Zagora | 1,310.65 mi (2,109.28 km) |
| Caister-on-Sea to Svilengrad | 1,362.24 mi (2,192.31 km) |
| Caister-on-Sea to Svishtov | 1,246.86 mi (2,006.63 km) |
| Caister-on-Sea to Targovishte | 1,311.11 mi (2,110.03 km) |
| Caister-on-Sea to Teteven | 1,235.63 mi (1,988.56 km) |
| Caister-on-Sea to Troyan | 1,254.41 mi (2,018.79 km) |
| Caister-on-Sea to Tryavna | 1,285.42 mi (2,068.69 km) |
| Caister-on-Sea to Tutrakan | 1,278.84 mi (2,058.10 km) |
| Caister-on-Sea to Varna | 1,365.42 mi (2,197.43 km) |
