| Castelfiorentino to Smolyan | 711.44 mi (1,144.96 km) |
| Castelfiorentino to Sofia | 625.72 mi (1,007.00 km) |
| Castelfiorentino to Sopot | 697.36 mi (1,122.29 km) |
| Castelfiorentino to Sozopol | 847.94 mi (1,364.63 km) |
| Castelfiorentino to Sredets | 823.83 mi (1,325.83 km) |
| Castelfiorentino to Stamboliyski | 693.66 mi (1,116.34 km) |
| Castelfiorentino to Stara Zagora | 745.15 mi (1,199.20 km) |
| Castelfiorentino to Svilengrad | 782.87 mi (1,259.90 km) |
| Castelfiorentino to Svishtov | 718.67 mi (1,156.59 km) |
| Castelfiorentino to Targovishte | 782.87 mi (1,259.91 km) |
| Castelfiorentino to Teteven | 670.18 mi (1,078.55 km) |
| Castelfiorentino to Troyan | 693.04 mi (1,115.35 km) |
| Castelfiorentino to Tryavna | 732.41 mi (1,178.70 km) |
| Castelfiorentino to Tutrakan | 779.57 mi (1,254.59 km) |
| Castelfiorentino to Varna | 849.73 mi (1,367.51 km) |
