| Bialystok to Smolyan | 801.42 mi (1,289.77 km) |
| Bialystok to Sofia | 721.06 mi (1,160.43 km) |
| Bialystok to Sopot | 728.22 mi (1,171.95 km) |
| Bialystok to Sozopol | 769.78 mi (1,238.85 km) |
| Bialystok to Sredets | 768.31 mi (1,236.48 km) |
| Bialystok to Stamboliyski | 762.87 mi (1,227.71 km) |
| Bialystok to Stara Zagora | 748.40 mi (1,204.43 km) |
| Bialystok to Svilengrad | 798.16 mi (1,284.51 km) |
| Bialystok to Svishtov | 665.32 mi (1,070.73 km) |
| Bialystok to Targovishte | 700.91 mi (1,128.00 km) |
| Bialystok to Teteven | 707.91 mi (1,139.27 km) |
| Bialystok to Troyan | 712.01 mi (1,145.87 km) |
| Bialystok to Tryavna | 717.67 mi (1,154.98 km) |
| Bialystok to Tutrakan | 647.26 mi (1,041.67 km) |
| Bialystok to Varna | 719.29 mi (1,157.59 km) |
