| Duisburg to Smolyan | 1,086.26 mi (1,748.17 km) |
| Duisburg to Sofia | 982.15 mi (1,580.62 km) |
| Duisburg to Sopot | 1,037.43 mi (1,669.58 km) |
| Duisburg to Sozopol | 1,161.72 mi (1,869.60 km) |
| Duisburg to Sredets | 1,145.11 mi (1,842.88 km) |
| Duisburg to Stamboliyski | 1,053.59 mi (1,695.59 km) |
| Duisburg to Stara Zagora | 1,081.56 mi (1,740.61 km) |
| Duisburg to Svilengrad | 1,133.38 mi (1,824.00 km) |
| Duisburg to Svishtov | 1,017.30 mi (1,637.19 km) |
| Duisburg to Targovishte | 1,081.51 mi (1,740.52 km) |
| Duisburg to Teteven | 1,006.88 mi (1,620.42 km) |
| Duisburg to Troyan | 1,025.44 mi (1,650.29 km) |
| Duisburg to Tryavna | 1,056.13 mi (1,699.68 km) |
| Duisburg to Tutrakan | 1,049.37 mi (1,688.80 km) |
| Duisburg to Varna | 1,135.90 mi (1,828.06 km) |
