| Hardenberg to Karlovo | 1,084.72 mi (1,745.69 km) |
| Hardenberg to Karnobat | 1,164.41 mi (1,873.94 km) |
| Hardenberg to Kavarna | 1,178.79 mi (1,897.08 km) |
| Hardenberg to Kazanlak | 1,107.29 mi (1,782.00 km) |
| Hardenberg to Knezha | 1,017.10 mi (1,636.86 km) |
| Hardenberg to Kostinbrod | 1,020.25 mi (1,641.94 km) |
| Hardenberg to Kozloduy | 990.92 mi (1,594.73 km) |
| Hardenberg to Kyustendil | 1,029.55 mi (1,656.91 km) |
| Hardenberg to Levski | 1,061.57 mi (1,708.43 km) |
| Hardenberg to Lom | 971.11 mi (1,562.85 km) |
| Hardenberg to Lovech | 1,057.54 mi (1,701.95 km) |
| Hardenberg to Lukovit | 1,034.61 mi (1,665.04 km) |
| Hardenberg to Lyaskovets | 1,095.58 mi (1,763.17 km) |
| Hardenberg to Mezdra | 1,020.48 mi (1,642.31 km) |
| Hardenberg to Momchilgrad | 1,161.85 mi (1,869.81 km) |
