| Castellabate to Smolyan | 516.43 mi (831.11 km) |
| Castellabate to Sofia | 464.46 mi (747.48 km) |
| Castellabate to Sopot | 532.69 mi (857.28 km) |
| Castellabate to Sozopol | 676.78 mi (1,089.17 km) |
| Castellabate to Sredets | 650.86 mi (1,047.46 km) |
| Castellabate to Stamboliyski | 513.92 mi (827.07 km) |
| Castellabate to Stara Zagora | 573.96 mi (923.70 km) |
| Castellabate to Svilengrad | 594.78 mi (957.20 km) |
| Castellabate to Svishtov | 581.40 mi (935.68 km) |
| Castellabate to Targovishte | 632.92 mi (1,018.59 km) |
| Castellabate to Teteven | 514.25 mi (827.60 km) |
| Castellabate to Troyan | 535.36 mi (861.58 km) |
| Castellabate to Tryavna | 573.28 mi (922.61 km) |
| Castellabate to Tutrakan | 650.93 mi (1,047.57 km) |
| Castellabate to Varna | 697.58 mi (1,122.65 km) |
