| Duderstadt to Smolyan | 966.99 mi (1,556.21 km) |
| Duderstadt to Sofia | 862.75 mi (1,388.46 km) |
| Duderstadt to Sopot | 913.39 mi (1,469.96 km) |
| Duderstadt to Sozopol | 1,030.59 mi (1,658.58 km) |
| Duderstadt to Sredets | 1,015.43 mi (1,634.17 km) |
| Duderstadt to Stamboliyski | 932.52 mi (1,500.75 km) |
| Duderstadt to Stara Zagora | 955.72 mi (1,538.08 km) |
| Duderstadt to Svilengrad | 1,008.59 mi (1,623.18 km) |
| Duderstadt to Svishtov | 887.37 mi (1,428.08 km) |
| Duderstadt to Targovishte | 949.94 mi (1,528.79 km) |
| Duderstadt to Teteven | 883.21 mi (1,421.39 km) |
| Duderstadt to Troyan | 900.49 mi (1,449.20 km) |
| Duderstadt to Tryavna | 928.93 mi (1,494.96 km) |
| Duderstadt to Tutrakan | 914.68 mi (1,472.04 km) |
| Duderstadt to Varna | 1,001.51 mi (1,611.77 km) |
