| Kassel to Smolyan | 984.31 mi (1,584.09 km) |
| Kassel to Sofia | 880.00 mi (1,416.23 km) |
| Kassel to Sopot | 932.39 mi (1,500.53 km) |
| Kassel to Sozopol | 1,052.39 mi (1,693.66 km) |
| Kassel to Sredets | 1,036.65 mi (1,668.32 km) |
| Kassel to Stamboliyski | 950.45 mi (1,529.60 km) |
| Kassel to Stara Zagora | 975.42 mi (1,569.79 km) |
| Kassel to Svilengrad | 1,027.95 mi (1,654.32 km) |
| Kassel to Svishtov | 908.60 mi (1,462.25 km) |
| Kassel to Targovishte | 971.87 mi (1,564.07 km) |
| Kassel to Teteven | 902.04 mi (1,451.69 km) |
| Kassel to Troyan | 919.82 mi (1,480.30 km) |
| Kassel to Tryavna | 949.13 mi (1,527.47 km) |
| Kassel to Tutrakan | 937.87 mi (1,509.36 km) |
| Kassel to Varna | 1,024.62 mi (1,648.97 km) |
