| Castel San Giovanni to Smolyan | 802.54 mi (1,291.56 km) |
| Castel San Giovanni to Sofia | 709.96 mi (1,142.57 km) |
| Castel San Giovanni to Sopot | 779.72 mi (1,254.84 km) |
| Castel San Giovanni to Sozopol | 927.81 mi (1,493.17 km) |
| Castel San Giovanni to Sredets | 904.91 mi (1,456.31 km) |
| Castel San Giovanni to Stamboliyski | 780.75 mi (1,256.49 km) |
| Castel San Giovanni to Stara Zagora | 827.92 mi (1,332.41 km) |
| Castel San Giovanni to Svilengrad | 869.85 mi (1,399.89 km) |
| Castel San Giovanni to Svishtov | 791.53 mi (1,273.84 km) |
| Castel San Giovanni to Targovishte | 857.61 mi (1,380.19 km) |
| Castel San Giovanni to Teteven | 750.90 mi (1,208.46 km) |
| Castel San Giovanni to Troyan | 773.40 mi (1,244.67 km) |
| Castel San Giovanni to Tryavna | 811.79 mi (1,306.44 km) |
| Castel San Giovanni to Tutrakan | 847.30 mi (1,363.60 km) |
| Castel San Giovanni to Varna | 923.23 mi (1,485.80 km) |
