| Sonderborg to Karlovo | 1,084.35 mi (1,745.09 km) |
| Sonderborg to Karnobat | 1,148.30 mi (1,848.01 km) |
| Sonderborg to Kavarna | 1,146.89 mi (1,845.74 km) |
| Sonderborg to Kazanlak | 1,102.66 mi (1,774.56 km) |
| Sonderborg to Knezha | 1,014.85 mi (1,633.24 km) |
| Sonderborg to Kostinbrod | 1,031.07 mi (1,659.35 km) |
| Sonderborg to Kozloduy | 988.83 mi (1,591.37 km) |
| Sonderborg to Kyustendil | 1,049.23 mi (1,688.57 km) |
| Sonderborg to Levski | 1,052.41 mi (1,693.70 km) |
| Sonderborg to Lom | 972.68 mi (1,565.38 km) |
| Sonderborg to Lovech | 1,053.62 mi (1,695.64 km) |
| Sonderborg to Lukovit | 1,034.41 mi (1,664.71 km) |
| Sonderborg to Lyaskovets | 1,084.47 mi (1,745.29 km) |
| Sonderborg to Mezdra | 1,024.46 mi (1,648.70 km) |
| Sonderborg to Momchilgrad | 1,165.75 mi (1,876.10 km) |
