| Donaueschingen to Smolyan | 905.69 mi (1,457.57 km) |
| Donaueschingen to Sofia | 804.69 mi (1,295.03 km) |
| Donaueschingen to Sopot | 868.18 mi (1,397.21 km) |
| Donaueschingen to Sozopol | 1,006.68 mi (1,620.09 km) |
| Donaueschingen to Sredets | 986.65 mi (1,587.86 km) |
| Donaueschingen to Stamboliyski | 877.50 mi (1,412.20 km) |
| Donaueschingen to Stara Zagora | 915.26 mi (1,472.97 km) |
| Donaueschingen to Svilengrad | 963.33 mi (1,550.33 km) |
| Donaueschingen to Svishtov | 863.07 mi (1,388.98 km) |
| Donaueschingen to Targovishte | 929.76 mi (1,496.30 km) |
| Donaueschingen to Teteven | 837.73 mi (1,348.20 km) |
| Donaueschingen to Troyan | 858.64 mi (1,381.85 km) |
| Donaueschingen to Tryavna | 893.77 mi (1,438.39 km) |
| Donaueschingen to Tutrakan | 907.74 mi (1,460.87 km) |
| Donaueschingen to Varna | 990.93 mi (1,594.74 km) |
