| Castellammare del Golfo to Smolyan | 673.07 mi (1,083.20 km) |
| Castellammare del Golfo to Sofia | 637.20 mi (1,025.47 km) |
| Castellammare del Golfo to Sopot | 701.11 mi (1,128.33 km) |
| Castellammare del Golfo to Sozopol | 837.19 mi (1,347.33 km) |
| Castellammare del Golfo to Sredets | 811.42 mi (1,305.85 km) |
| Castellammare del Golfo to Stamboliyski | 677.47 mi (1,090.29 km) |
| Castellammare del Golfo to Stara Zagora | 738.20 mi (1,188.02 km) |
| Castellammare del Golfo to Svilengrad | 750.87 mi (1,208.41 km) |
| Castellammare del Golfo to Svishtov | 756.61 mi (1,217.64 km) |
| Castellammare del Golfo to Targovishte | 802.63 mi (1,291.72 km) |
| Castellammare del Golfo to Teteven | 686.40 mi (1,104.65 km) |
| Castellammare del Golfo to Troyan | 706.06 mi (1,136.29 km) |
| Castellammare del Golfo to Tryavna | 741.99 mi (1,194.12 km) |
| Castellammare del Golfo to Tutrakan | 826.48 mi (1,330.08 km) |
| Castellammare del Golfo to Varna | 864.60 mi (1,391.44 km) |
