| Castellarano to Smolyan | 730.95 mi (1,176.35 km) |
| Castellarano to Sofia | 639.86 mi (1,029.76 km) |
| Castellarano to Sopot | 710.24 mi (1,143.02 km) |
| Castellarano to Sozopol | 859.25 mi (1,382.82 km) |
| Castellarano to Sredets | 835.97 mi (1,345.36 km) |
| Castellarano to Stamboliyski | 710.06 mi (1,142.73 km) |
| Castellarano to Stara Zagora | 758.41 mi (1,220.54 km) |
| Castellarano to Svilengrad | 799.30 mi (1,286.35 km) |
| Castellarano to Svishtov | 724.87 mi (1,166.56 km) |
| Castellarano to Targovishte | 790.48 mi (1,272.16 km) |
| Castellarano to Teteven | 681.82 mi (1,097.29 km) |
| Castellarano to Troyan | 704.47 mi (1,133.73 km) |
| Castellarano to Tryavna | 743.19 mi (1,196.06 km) |
| Castellarano to Tutrakan | 782.43 mi (1,259.20 km) |
| Castellarano to Varna | 856.59 mi (1,378.56 km) |
