| Castel Mella to Smolyan | 775.98 mi (1,248.82 km) |
| Castel Mella to Sofia | 681.07 mi (1,096.07 km) |
| Castel Mella to Sopot | 749.81 mi (1,206.70 km) |
| Castel Mella to Sozopol | 896.50 mi (1,442.78 km) |
| Castel Mella to Sredets | 874.09 mi (1,406.72 km) |
| Castel Mella to Stamboliyski | 752.63 mi (1,211.25 km) |
| Castel Mella to Stara Zagora | 797.97 mi (1,284.20 km) |
| Castel Mella to Svilengrad | 841.36 mi (1,354.03 km) |
| Castel Mella to Svishtov | 758.35 mi (1,220.45 km) |
| Castel Mella to Targovishte | 824.80 mi (1,327.38 km) |
| Castel Mella to Teteven | 720.52 mi (1,159.57 km) |
| Castel Mella to Troyan | 742.80 mi (1,195.41 km) |
| Castel Mella to Tryavna | 780.68 mi (1,256.39 km) |
| Castel Mella to Tutrakan | 812.39 mi (1,307.41 km) |
| Castel Mella to Varna | 889.83 mi (1,432.04 km) |
