| Sluis to Smolyan | 1,210.04 mi (1,947.37 km) |
| Sluis to Sofia | 1,106.64 mi (1,780.96 km) |
| Sluis to Sopot | 1,165.00 mi (1,874.89 km) |
| Sluis to Sozopol | 1,294.04 mi (2,082.56 km) |
| Sluis to Sredets | 1,276.42 mi (2,054.20 km) |
| Sluis to Stamboliyski | 1,178.89 mi (1,897.24 km) |
| Sluis to Stara Zagora | 1,210.27 mi (1,947.74 km) |
| Sluis to Svilengrad | 1,261.07 mi (2,029.50 km) |
| Sluis to Svishtov | 1,149.27 mi (1,849.57 km) |
| Sluis to Targovishte | 1,214.41 mi (1,954.41 km) |
| Sluis to Teteven | 1,134.35 mi (1,825.55 km) |
| Sluis to Troyan | 1,153.75 mi (1,856.78 km) |
| Sluis to Tryavna | 1,185.95 mi (1,908.60 km) |
| Sluis to Tutrakan | 1,184.64 mi (1,906.49 km) |
| Sluis to Varna | 1,270.72 mi (2,045.02 km) |
