| Bad Harzburg to Karlovo | 920.82 mi (1,481.91 km) |
| Bad Harzburg to Karnobat | 996.62 mi (1,603.90 km) |
| Bad Harzburg to Kavarna | 1,007.96 mi (1,622.15 km) |
| Bad Harzburg to Kazanlak | 942.24 mi (1,516.38 km) |
| Bad Harzburg to Knezha | 852.36 mi (1,371.75 km) |
| Bad Harzburg to Kostinbrod | 859.69 mi (1,383.54 km) |
| Bad Harzburg to Kozloduy | 826.11 mi (1,329.49 km) |
| Bad Harzburg to Kyustendil | 872.31 mi (1,403.85 km) |
| Bad Harzburg to Levski | 895.13 mi (1,440.57 km) |
| Bad Harzburg to Lom | 807.29 mi (1,299.20 km) |
| Bad Harzburg to Lovech | 892.50 mi (1,436.34 km) |
| Bad Harzburg to Lukovit | 870.55 mi (1,401.01 km) |
| Bad Harzburg to Lyaskovets | 928.77 mi (1,494.72 km) |
| Bad Harzburg to Mezdra | 857.65 mi (1,380.25 km) |
| Bad Harzburg to Momchilgrad | 999.56 mi (1,608.64 km) |
