| Sigmaringen to Smolyan | 879.35 mi (1,415.18 km) |
| Sigmaringen to Sofia | 777.72 mi (1,251.61 km) |
| Sigmaringen to Sopot | 840.32 mi (1,352.37 km) |
| Sigmaringen to Sozopol | 977.53 mi (1,573.19 km) |
| Sigmaringen to Sredets | 957.82 mi (1,541.46 km) |
| Sigmaringen to Stamboliyski | 850.50 mi (1,368.75 km) |
| Sigmaringen to Stara Zagora | 887.15 mi (1,427.73 km) |
| Sigmaringen to Svilengrad | 935.75 mi (1,505.94 km) |
| Sigmaringen to Svishtov | 833.60 mi (1,341.55 km) |
| Sigmaringen to Targovishte | 900.18 mi (1,448.69 km) |
| Sigmaringen to Teteven | 809.79 mi (1,303.24 km) |
| Sigmaringen to Troyan | 830.48 mi (1,336.52 km) |
| Sigmaringen to Tryavna | 865.19 mi (1,392.38 km) |
| Sigmaringen to Tutrakan | 877.24 mi (1,411.77 km) |
| Sigmaringen to Varna | 960.84 mi (1,546.31 km) |
