| Bolsward to Smolyan | 1,191.22 mi (1,917.08 km) |
| Bolsward to Sofia | 1,086.92 mi (1,749.23 km) |
| Bolsward to Sopot | 1,139.01 mi (1,833.06 km) |
| Bolsward to Sozopol | 1,257.30 mi (2,023.44 km) |
| Bolsward to Sredets | 1,242.06 mi (1,998.90 km) |
| Bolsward to Stamboliyski | 1,157.32 mi (1,862.52 km) |
| Bolsward to Stara Zagora | 1,181.77 mi (1,901.88 km) |
| Bolsward to Svilengrad | 1,234.45 mi (1,986.66 km) |
| Bolsward to Svishtov | 1,113.99 mi (1,792.79 km) |
| Bolsward to Targovishte | 1,176.66 mi (1,893.65 km) |
| Bolsward to Teteven | 1,108.71 mi (1,784.30 km) |
| Bolsward to Troyan | 1,126.32 mi (1,812.64 km) |
| Bolsward to Tryavna | 1,155.22 mi (1,859.14 km) |
| Bolsward to Tutrakan | 1,141.26 mi (1,836.68 km) |
| Bolsward to Varna | 1,228.10 mi (1,976.43 km) |
