| Sondershausen to Karlovo | 888.73 mi (1,430.27 km) |
| Sondershausen to Karnobat | 966.36 mi (1,555.21 km) |
| Sondershausen to Kavarna | 979.84 mi (1,576.90 km) |
| Sondershausen to Kazanlak | 910.62 mi (1,465.51 km) |
| Sondershausen to Knezha | 820.58 mi (1,320.60 km) |
| Sondershausen to Kostinbrod | 826.43 mi (1,330.01 km) |
| Sondershausen to Kozloduy | 794.35 mi (1,278.38 km) |
| Sondershausen to Kyustendil | 838.14 mi (1,348.86 km) |
| Sondershausen to Levski | 864.13 mi (1,390.69 km) |
| Sondershausen to Lom | 775.11 mi (1,247.43 km) |
| Sondershausen to Lovech | 860.86 mi (1,385.42 km) |
| Sondershausen to Lukovit | 838.50 mi (1,349.44 km) |
| Sondershausen to Lyaskovets | 897.97 mi (1,445.15 km) |
| Sondershausen to Mezdra | 825.13 mi (1,327.92 km) |
| Sondershausen to Momchilgrad | 966.91 mi (1,556.10 km) |
