| Soyaux to Smolyan | 1,252.08 mi (2,015.03 km) |
| Soyaux to Sofia | 1,160.04 mi (1,866.90 km) |
| Soyaux to Sopot | 1,229.69 mi (1,978.99 km) |
| Soyaux to Sozopol | 1,377.28 mi (2,216.52 km) |
| Soyaux to Sredets | 1,354.62 mi (2,180.05 km) |
| Soyaux to Stamboliyski | 1,230.78 mi (1,980.74 km) |
| Soyaux to Stara Zagora | 1,277.89 mi (2,056.56 km) |
| Soyaux to Svilengrad | 1,319.91 mi (2,124.19 km) |
| Soyaux to Svishtov | 1,239.50 mi (1,994.78 km) |
| Soyaux to Targovishte | 1,305.95 mi (2,101.72 km) |
| Soyaux to Teteven | 1,200.74 mi (1,932.40 km) |
| Soyaux to Troyan | 1,223.16 mi (1,968.49 km) |
| Soyaux to Tryavna | 1,261.34 mi (2,029.93 km) |
| Soyaux to Tutrakan | 1,292.97 mi (2,080.84 km) |
| Soyaux to Varna | 1,370.95 mi (2,206.33 km) |
