| Alfeld to Smolyan | 1,002.25 mi (1,612.97 km) |
| Alfeld to Sofia | 898.08 mi (1,445.32 km) |
| Alfeld to Sopot | 947.90 mi (1,525.50 km) |
| Alfeld to Sozopol | 1,063.42 mi (1,711.42 km) |
| Alfeld to Sredets | 1,048.63 mi (1,687.61 km) |
| Alfeld to Stamboliyski | 967.53 mi (1,557.09 km) |
| Alfeld to Stara Zagora | 989.83 mi (1,592.98 km) |
| Alfeld to Svilengrad | 1,042.88 mi (1,678.35 km) |
| Alfeld to Svishtov | 920.62 mi (1,481.60 km) |
| Alfeld to Targovishte | 982.72 mi (1,581.54 km) |
| Alfeld to Teteven | 917.81 mi (1,477.07 km) |
| Alfeld to Troyan | 934.83 mi (1,504.47 km) |
| Alfeld to Tryavna | 962.78 mi (1,549.44 km) |
| Alfeld to Tutrakan | 946.59 mi (1,523.38 km) |
| Alfeld to Varna | 1,033.42 mi (1,663.14 km) |
