| Soure to Smolyan | 1,735.38 mi (2,792.83 km) |
| Soure to Sofia | 1,657.33 mi (2,667.22 km) |
| Soure to Sopot | 1,729.49 mi (2,783.35 km) |
| Soure to Sozopol | 1,880.54 mi (3,026.43 km) |
| Soure to Sredets | 1,855.82 mi (2,986.66 km) |
| Soure to Stamboliyski | 1,722.19 mi (2,771.60 km) |
| Soure to Stara Zagora | 1,776.60 mi (2,859.17 km) |
| Soure to Svilengrad | 1,810.34 mi (2,913.46 km) |
| Soure to Svishtov | 1,754.30 mi (2,823.27 km) |
| Soure to Targovishte | 1,817.96 mi (2,925.73 km) |
| Soure to Teteven | 1,703.46 mi (2,741.45 km) |
| Soure to Troyan | 1,726.35 mi (2,778.29 km) |
| Soure to Tryavna | 1,765.95 mi (2,842.02 km) |
| Soure to Tutrakan | 1,815.39 mi (2,921.58 km) |
| Soure to Varna | 1,884.99 mi (3,033.60 km) |
