| Quattro Castella to Smolyan | 747.13 mi (1,202.38 km) |
| Quattro Castella to Sofia | 655.89 mi (1,055.56 km) |
| Quattro Castella to Sopot | 726.21 mi (1,168.72 km) |
| Quattro Castella to Sozopol | 875.11 mi (1,408.35 km) |
| Quattro Castella to Sredets | 851.88 mi (1,370.96 km) |
| Quattro Castella to Stamboliyski | 726.16 mi (1,168.64 km) |
| Quattro Castella to Stara Zagora | 774.38 mi (1,246.24 km) |
| Quattro Castella to Svilengrad | 815.39 mi (1,312.24 km) |
| Quattro Castella to Svishtov | 740.46 mi (1,191.65 km) |
| Quattro Castella to Targovishte | 806.14 mi (1,297.36 km) |
| Quattro Castella to Teteven | 697.74 mi (1,122.90 km) |
| Quattro Castella to Troyan | 720.36 mi (1,159.31 km) |
| Quattro Castella to Tryavna | 759.05 mi (1,221.57 km) |
| Quattro Castella to Tutrakan | 797.75 mi (1,283.86 km) |
| Quattro Castella to Varna | 872.19 mi (1,403.66 km) |
