| Castel San Giorgio to Smolyan | 522.63 mi (841.09 km) |
| Castel San Giorgio to Sofia | 463.96 mi (746.67 km) |
| Castel San Giorgio to Sopot | 533.77 mi (859.01 km) |
| Castel San Giorgio to Sozopol | 680.39 mi (1,094.99 km) |
| Castel San Giorgio to Sredets | 654.56 mi (1,053.41 km) |
| Castel San Giorgio to Stamboliyski | 517.34 mi (832.58 km) |
| Castel San Giorgio to Stara Zagora | 576.63 mi (927.99 km) |
| Castel San Giorgio to Svilengrad | 600.56 mi (966.50 km) |
| Castel San Giorgio to Svishtov | 578.69 mi (931.31 km) |
| Castel San Giorgio to Targovishte | 632.74 mi (1,018.29 km) |
| Castel San Giorgio to Teteven | 513.63 mi (826.60 km) |
| Castel San Giorgio to Troyan | 535.31 mi (861.50 km) |
| Castel San Giorgio to Tryavna | 573.94 mi (923.67 km) |
| Castel San Giorgio to Tutrakan | 647.67 mi (1,042.32 km) |
| Castel San Giorgio to Varna | 698.32 mi (1,123.84 km) |
