| Welkenraedt to Sofia | 985.95 mi (1,586.73 km) |
| Welkenraedt to Sopot | 1,044.05 mi (1,680.24 km) |
| Welkenraedt to Sozopol | 1,173.09 mi (1,887.91 km) |
| Welkenraedt to Sredets | 1,155.42 mi (1,859.47 km) |
| Welkenraedt to Stamboliyski | 1,058.13 mi (1,702.89 km) |
| Welkenraedt to Stara Zagora | 1,089.27 mi (1,753.02 km) |
| Welkenraedt to Svilengrad | 1,140.13 mi (1,834.86 km) |
| Welkenraedt to Svishtov | 1,028.32 mi (1,654.91 km) |
| Welkenraedt to Targovishte | 1,093.52 mi (1,759.85 km) |
| Welkenraedt to Teteven | 1,013.40 mi (1,630.91 km) |
| Welkenraedt to Troyan | 1,032.76 mi (1,662.07 km) |
| Welkenraedt to Tryavna | 1,064.93 mi (1,713.84 km) |
| Welkenraedt to Tutrakan | 1,064.08 mi (1,712.47 km) |
| Welkenraedt to Varna | 1,150.06 mi (1,850.84 km) |
| Welkenraedt to Veliki Preslav | 1,106.46 mi (1,780.68 km) |
