| Wulfrath to Smolyan | 1,070.82 mi (1,723.32 km) |
| Wulfrath to Sofia | 966.73 mi (1,555.80 km) |
| Wulfrath to Sopot | 1,022.15 mi (1,645.00 km) |
| Wulfrath to Sozopol | 1,146.77 mi (1,845.55 km) |
| Wulfrath to Sredets | 1,130.08 mi (1,818.70 km) |
| Wulfrath to Stamboliyski | 1,038.21 mi (1,670.83 km) |
| Wulfrath to Stara Zagora | 1,066.36 mi (1,716.14 km) |
| Wulfrath to Svilengrad | 1,118.12 mi (1,799.44 km) |
| Wulfrath to Svishtov | 1,002.31 mi (1,613.07 km) |
| Wulfrath to Targovishte | 1,066.60 mi (1,716.53 km) |
| Wulfrath to Teteven | 991.60 mi (1,595.82 km) |
| Wulfrath to Troyan | 1,010.21 mi (1,625.77 km) |
| Wulfrath to Tryavna | 1,040.99 mi (1,675.31 km) |
| Wulfrath to Tutrakan | 1,034.69 mi (1,665.17 km) |
| Wulfrath to Varna | 1,121.18 mi (1,804.37 km) |
