| Black Forest to Smolyan | 6,021.27 mi (9,690.29 km) |
| Black Forest to Sofia | 5,917.35 mi (9,523.05 km) |
| Black Forest to Sopot | 5,963.90 mi (9,597.97 km) |
| Black Forest to Sozopol | 6,065.20 mi (9,761.00 km) |
| Black Forest to Sredets | 6,054.26 mi (9,743.39 km) |
| Black Forest to Stamboliyski | 5,985.75 mi (9,633.14 km) |
| Black Forest to Stara Zagora | 6,003.26 mi (9,661.31 km) |
| Black Forest to Svilengrad | 6,057.08 mi (9,747.93 km) |
| Black Forest to Svishtov | 5,928.51 mi (9,541.01 km) |
| Black Forest to Targovishte | 5,985.49 mi (9,632.72 km) |
| Black Forest to Teteven | 5,934.42 mi (9,550.52 km) |
| Black Forest to Troyan | 5,950.00 mi (9,575.60 km) |
| Black Forest to Tryavna | 5,974.63 mi (9,615.23 km) |
| Black Forest to Tutrakan | 5,941.63 mi (9,562.13 km) |
| Black Forest to Varna | 6,026.20 mi (9,698.23 km) |
