| Willich to Smolyan | 1,087.97 mi (1,750.92 km) |
| Willich to Sofia | 983.96 mi (1,583.53 km) |
| Willich to Sopot | 1,039.92 mi (1,673.59 km) |
| Willich to Sozopol | 1,165.36 mi (1,875.46 km) |
| Willich to Sredets | 1,148.50 mi (1,848.33 km) |
| Willich to Stamboliyski | 1,055.60 mi (1,698.82 km) |
| Willich to Stara Zagora | 1,084.33 mi (1,745.05 km) |
| Willich to Svilengrad | 1,135.93 mi (1,828.10 km) |
| Willich to Svishtov | 1,020.82 mi (1,642.85 km) |
| Willich to Targovishte | 1,085.28 mi (1,746.58 km) |
| Willich to Teteven | 1,009.34 mi (1,624.37 km) |
| Willich to Troyan | 1,028.09 mi (1,654.56 km) |
| Willich to Tryavna | 1,059.14 mi (1,704.52 km) |
| Willich to Tutrakan | 1,053.76 mi (1,695.86 km) |
| Willich to Varna | 1,140.19 mi (1,834.95 km) |
