| Dortmund to Smolyan | 1,063.78 mi (1,711.99 km) |
| Dortmund to Sofia | 959.56 mi (1,544.26 km) |
| Dortmund to Sopot | 1,013.86 mi (1,631.66 km) |
| Dortmund to Sozopol | 1,136.62 mi (1,829.21 km) |
| Dortmund to Sredets | 1,120.34 mi (1,803.01 km) |
| Dortmund to Stamboliyski | 1,030.69 mi (1,658.74 km) |
| Dortmund to Stara Zagora | 1,057.63 mi (1,702.08 km) |
| Dortmund to Svilengrad | 1,109.71 mi (1,785.90 km) |
| Dortmund to Svishtov | 992.41 mi (1,597.13 km) |
| Dortmund to Targovishte | 1,056.27 mi (1,699.91 km) |
| Dortmund to Teteven | 983.38 mi (1,582.59 km) |
| Dortmund to Troyan | 1,001.67 mi (1,612.03 km) |
| Dortmund to Tryavna | 1,031.87 mi (1,660.64 km) |
| Dortmund to Tutrakan | 1,023.40 mi (1,647.00 km) |
| Dortmund to Varna | 1,110.03 mi (1,786.43 km) |
