| Silleda to Smolyan | 1,678.29 mi (2,700.94 km) |
| Silleda to Sofia | 1,593.25 mi (2,564.09 km) |
| Silleda to Sopot | 1,664.69 mi (2,679.06 km) |
| Silleda to Sozopol | 1,814.89 mi (2,920.79 km) |
| Silleda to Sredets | 1,791.05 mi (2,882.42 km) |
| Silleda to Stamboliyski | 1,661.29 mi (2,673.59 km) |
| Silleda to Stara Zagora | 1,712.61 mi (2,756.17 km) |
| Silleda to Svilengrad | 1,750.45 mi (2,817.08 km) |
| Silleda to Svishtov | 1,682.24 mi (2,707.31 km) |
| Silleda to Targovishte | 1,747.64 mi (2,812.55 km) |
| Silleda to Teteven | 1,637.10 mi (2,634.66 km) |
| Silleda to Troyan | 1,659.90 mi (2,671.36 km) |
| Silleda to Tryavna | 1,699.04 mi (2,734.34 km) |
| Silleda to Tutrakan | 1,739.65 mi (2,799.69 km) |
| Silleda to Varna | 1,813.93 mi (2,919.25 km) |
