| Quedlinburg to Smolyan | 950.95 mi (1,530.41 km) |
| Quedlinburg to Sofia | 846.98 mi (1,363.08 km) |
| Quedlinburg to Sopot | 895.26 mi (1,440.78 km) |
| Quedlinburg to Sozopol | 1,008.60 mi (1,623.18 km) |
| Quedlinburg to Sredets | 994.22 mi (1,600.04 km) |
| Quedlinburg to Stamboliyski | 915.75 mi (1,473.76 km) |
| Quedlinburg to Stara Zagora | 936.58 mi (1,507.28 km) |
| Quedlinburg to Svilengrad | 989.85 mi (1,593.02 km) |
| Quedlinburg to Svishtov | 866.32 mi (1,394.20 km) |
| Quedlinburg to Targovishte | 927.88 mi (1,493.28 km) |
| Quedlinburg to Teteven | 865.34 mi (1,392.64 km) |
| Quedlinburg to Troyan | 881.95 mi (1,419.36 km) |
| Quedlinburg to Tryavna | 909.18 mi (1,463.18 km) |
| Quedlinburg to Tutrakan | 890.96 mi (1,433.87 km) |
| Quedlinburg to Varna | 977.78 mi (1,573.59 km) |
