| Herstal to Sofia | 999.34 mi (1,608.29 km) |
| Herstal to Sopot | 1,057.70 mi (1,702.21 km) |
| Herstal to Sozopol | 1,187.12 mi (1,910.49 km) |
| Herstal to Sredets | 1,169.37 mi (1,881.92 km) |
| Herstal to Stamboliyski | 1,071.58 mi (1,724.55 km) |
| Herstal to Stara Zagora | 1,103.01 mi (1,775.13 km) |
| Herstal to Svilengrad | 1,153.77 mi (1,856.82 km) |
| Herstal to Svishtov | 1,042.34 mi (1,677.48 km) |
| Herstal to Targovishte | 1,107.61 mi (1,782.52 km) |
| Herstal to Teteven | 1,027.05 mi (1,652.87 km) |
| Herstal to Troyan | 1,046.48 mi (1,684.15 km) |
| Herstal to Tryavna | 1,078.77 mi (1,736.11 km) |
| Herstal to Tutrakan | 1,078.35 mi (1,735.44 km) |
| Herstal to Varna | 1,164.28 mi (1,873.74 km) |
| Herstal to Veliki Preslav | 1,120.55 mi (1,803.36 km) |
