| Boortmeerbeek to Sofia | 1,050.77 mi (1,691.05 km) |
| Boortmeerbeek to Sopot | 1,109.13 mi (1,784.96 km) |
| Boortmeerbeek to Sozopol | 1,238.33 mi (1,992.91 km) |
| Boortmeerbeek to Sredets | 1,220.65 mi (1,964.45 km) |
| Boortmeerbeek to Stamboliyski | 1,123.02 mi (1,807.32 km) |
| Boortmeerbeek to Stara Zagora | 1,154.41 mi (1,857.84 km) |
| Boortmeerbeek to Svilengrad | 1,205.20 mi (1,939.58 km) |
| Boortmeerbeek to Svishtov | 1,093.56 mi (1,759.91 km) |
| Boortmeerbeek to Targovishte | 1,158.76 mi (1,864.84 km) |
| Boortmeerbeek to Teteven | 1,078.47 mi (1,735.63 km) |
| Boortmeerbeek to Troyan | 1,097.88 mi (1,766.88 km) |
| Boortmeerbeek to Tryavna | 1,130.12 mi (1,818.75 km) |
| Boortmeerbeek to Tutrakan | 1,129.23 mi (1,817.32 km) |
| Boortmeerbeek to Varna | 1,215.24 mi (1,955.74 km) |
| Boortmeerbeek to Veliki Preslav | 1,171.70 mi (1,885.66 km) |
