| Bierbeek to Sofia | 1,038.43 mi (1,671.20 km) |
| Bierbeek to Sopot | 1,097.02 mi (1,765.48 km) |
| Bierbeek to Sozopol | 1,226.67 mi (1,974.13 km) |
| Bierbeek to Sredets | 1,208.88 mi (1,945.50 km) |
| Bierbeek to Stamboliyski | 1,110.72 mi (1,787.54 km) |
| Bierbeek to Stara Zagora | 1,142.40 mi (1,838.51 km) |
| Bierbeek to Svilengrad | 1,193.08 mi (1,920.08 km) |
| Bierbeek to Svishtov | 1,081.88 mi (1,741.12 km) |
| Bierbeek to Targovishte | 1,147.17 mi (1,846.20 km) |
| Bierbeek to Teteven | 1,066.36 mi (1,716.14 km) |
| Bierbeek to Troyan | 1,085.85 mi (1,747.50 km) |
| Bierbeek to Tryavna | 1,118.21 mi (1,799.59 km) |
| Bierbeek to Tutrakan | 1,117.95 mi (1,799.16 km) |
| Bierbeek to Varna | 1,203.88 mi (1,937.45 km) |
| Bierbeek to Veliki Preslav | 1,160.12 mi (1,867.04 km) |
