| Castenaso to Smolyan | 697.01 mi (1,121.73 km) |
| Castenaso to Sofia | 605.79 mi (974.93 km) |
| Castenaso to Sopot | 676.17 mi (1,088.19 km) |
| Castenaso to Sozopol | 825.20 mi (1,328.03 km) |
| Castenaso to Sredets | 801.91 mi (1,290.55 km) |
| Castenaso to Stamboliyski | 676.01 mi (1,087.94 km) |
| Castenaso to Stara Zagora | 724.33 mi (1,165.70 km) |
| Castenaso to Svilengrad | 765.25 mi (1,231.55 km) |
| Castenaso to Svishtov | 691.01 mi (1,112.07 km) |
| Castenaso to Targovishte | 756.56 mi (1,217.56 km) |
| Castenaso to Teteven | 647.76 mi (1,042.47 km) |
| Castenaso to Troyan | 670.41 mi (1,078.92 km) |
| Castenaso to Tryavna | 709.15 mi (1,141.27 km) |
| Castenaso to Tutrakan | 748.82 mi (1,205.12 km) |
| Castenaso to Varna | 822.72 mi (1,324.04 km) |
