| Erkrath to Karlovo | 1,027.17 mi (1,653.07 km) |
| Erkrath to Karnobat | 1,112.03 mi (1,789.65 km) |
| Erkrath to Kavarna | 1,132.47 mi (1,822.53 km) |
| Erkrath to Kazanlak | 1,051.09 mi (1,691.57 km) |
| Erkrath to Knezha | 960.93 mi (1,546.46 km) |
| Erkrath to Kostinbrod | 959.28 mi (1,543.81 km) |
| Erkrath to Kozloduy | 934.97 mi (1,504.69 km) |
| Erkrath to Kyustendil | 965.38 mi (1,553.63 km) |
| Erkrath to Levski | 1,007.52 mi (1,621.44 km) |
| Erkrath to Lom | 914.03 mi (1,470.99 km) |
| Erkrath to Lovech | 1,001.56 mi (1,611.86 km) |
| Erkrath to Lukovit | 977.49 mi (1,573.12 km) |
| Erkrath to Lyaskovets | 1,041.93 mi (1,676.83 km) |
| Erkrath to Mezdra | 961.98 mi (1,548.16 km) |
| Erkrath to Momchilgrad | 1,102.07 mi (1,773.62 km) |
