| Welver to Smolyan | 1,050.16 mi (1,690.08 km) |
| Welver to Sofia | 945.89 mi (1,522.26 km) |
| Welver to Sopot | 999.34 mi (1,608.28 km) |
| Welver to Sozopol | 1,120.73 mi (1,803.64 km) |
| Welver to Sredets | 1,104.73 mi (1,777.90 km) |
| Welver to Stamboliyski | 1,016.73 mi (1,636.27 km) |
| Welver to Stara Zagora | 1,042.76 mi (1,678.17 km) |
| Welver to Svilengrad | 1,095.06 mi (1,762.33 km) |
| Welver to Svishtov | 976.73 mi (1,571.89 km) |
| Welver to Targovishte | 1,040.28 mi (1,674.16 km) |
| Welver to Teteven | 968.91 mi (1,559.31 km) |
| Welver to Troyan | 986.96 mi (1,588.37 km) |
| Welver to Tryavna | 1,016.74 mi (1,636.29 km) |
| Welver to Tutrakan | 1,006.75 mi (1,620.21 km) |
| Welver to Varna | 1,093.46 mi (1,759.75 km) |
