| Altensteig to Smolyan | 919.53 mi (1,479.84 km) |
| Altensteig to Sofia | 817.37 mi (1,315.43 km) |
| Altensteig to Sopot | 879.04 mi (1,414.67 km) |
| Altensteig to Sozopol | 1,014.59 mi (1,632.83 km) |
| Altensteig to Sredets | 995.30 mi (1,601.79 km) |
| Altensteig to Stamboliyski | 890.10 mi (1,432.47 km) |
| Altensteig to Stara Zagora | 925.56 mi (1,489.54 km) |
| Altensteig to Svilengrad | 974.70 mi (1,568.63 km) |
| Altensteig to Svishtov | 870.28 mi (1,400.58 km) |
| Altensteig to Targovishte | 936.65 mi (1,507.40 km) |
| Altensteig to Teteven | 848.44 mi (1,365.43 km) |
| Altensteig to Troyan | 868.85 mi (1,398.28 km) |
| Altensteig to Tryavna | 903.04 mi (1,453.30 km) |
| Altensteig to Tutrakan | 912.24 mi (1,468.10 km) |
| Altensteig to Varna | 996.49 mi (1,603.69 km) |
