| Welling to Smolyan | 1,344.09 mi (2,163.11 km) |
| Welling to Sofia | 1,241.27 mi (1,997.63 km) |
| Welling to Sopot | 1,301.10 mi (2,093.92 km) |
| Welling to Sozopol | 1,432.26 mi (2,305.00 km) |
| Welling to Sredets | 1,414.19 mi (2,275.91 km) |
| Welling to Stamboliyski | 1,313.80 mi (2,114.36 km) |
| Welling to Stara Zagora | 1,346.86 mi (2,167.56 km) |
| Welling to Svilengrad | 1,397.09 mi (2,248.40 km) |
| Welling to Svishtov | 1,287.47 mi (2,071.98 km) |
| Welling to Targovishte | 1,352.96 mi (2,177.38 km) |
| Welling to Teteven | 1,270.44 mi (2,044.57 km) |
| Welling to Troyan | 1,290.23 mi (2,076.42 km) |
| Welling to Tryavna | 1,323.11 mi (2,129.34 km) |
| Welling to Tutrakan | 1,324.20 mi (2,131.09 km) |
| Welling to Varna | 1,410.04 mi (2,269.23 km) |
