| Herzogenrath to Karlovo | 1,047.56 mi (1,685.88 km) |
| Herzogenrath to Karnobat | 1,134.86 mi (1,826.37 km) |
| Herzogenrath to Kavarna | 1,158.00 mi (1,863.63 km) |
| Herzogenrath to Kazanlak | 1,072.14 mi (1,725.44 km) |
| Herzogenrath to Knezha | 982.17 mi (1,580.65 km) |
| Herzogenrath to Kostinbrod | 977.96 mi (1,573.88 km) |
| Herzogenrath to Kozloduy | 956.39 mi (1,539.17 km) |
| Herzogenrath to Kyustendil | 982.21 mi (1,580.71 km) |
| Herzogenrath to Levski | 1,029.72 mi (1,657.17 km) |
| Herzogenrath to Lom | 934.92 mi (1,504.62 km) |
| Herzogenrath to Lovech | 1,022.82 mi (1,646.07 km) |
| Herzogenrath to Lukovit | 998.21 mi (1,606.46 km) |
| Herzogenrath to Lyaskovets | 1,064.26 mi (1,712.77 km) |
| Herzogenrath to Mezdra | 982.00 mi (1,580.38 km) |
| Herzogenrath to Momchilgrad | 1,121.14 mi (1,804.29 km) |
