| Alcantarilla to Smolyan | 1,392.77 mi (2,241.45 km) |
| Alcantarilla to Sofia | 1,327.88 mi (2,137.02 km) |
| Alcantarilla to Sopot | 1,399.39 mi (2,252.11 km) |
| Alcantarilla to Sozopol | 1,548.48 mi (2,492.04 km) |
| Alcantarilla to Sredets | 1,522.83 mi (2,450.76 km) |
| Alcantarilla to Stamboliyski | 1,385.89 mi (2,230.37 km) |
| Alcantarilla to Stara Zagora | 1,444.08 mi (2,324.02 km) |
| Alcantarilla to Svilengrad | 1,470.48 mi (2,366.51 km) |
| Alcantarilla to Svishtov | 1,436.04 mi (2,311.08 km) |
| Alcantarilla to Targovishte | 1,495.14 mi (2,406.19 km) |
| Alcantarilla to Teteven | 1,376.64 mi (2,215.49 km) |
| Alcantarilla to Troyan | 1,399.09 mi (2,251.62 km) |
| Alcantarilla to Tryavna | 1,438.51 mi (2,315.06 km) |
| Alcantarilla to Tutrakan | 1,502.20 mi (2,417.55 km) |
| Alcantarilla to Varna | 1,561.93 mi (2,513.69 km) |
