| Grevenbroich to Karlovo | 1,035.36 mi (1,666.25 km) |
| Grevenbroich to Karnobat | 1,121.20 mi (1,804.39 km) |
| Grevenbroich to Kavarna | 1,142.70 mi (1,839.00 km) |
| Grevenbroich to Kazanlak | 1,059.55 mi (1,705.18 km) |
| Grevenbroich to Knezha | 969.44 mi (1,560.17 km) |
| Grevenbroich to Kostinbrod | 966.79 mi (1,555.90 km) |
| Grevenbroich to Kozloduy | 943.56 mi (1,518.51 km) |
| Grevenbroich to Kyustendil | 972.16 mi (1,564.54 km) |
| Grevenbroich to Levski | 1,016.42 mi (1,635.77 km) |
| Grevenbroich to Lom | 922.40 mi (1,484.46 km) |
| Grevenbroich to Lovech | 1,010.09 mi (1,625.59 km) |
| Grevenbroich to Lukovit | 985.81 mi (1,586.50 km) |
| Grevenbroich to Lyaskovets | 1,050.89 mi (1,691.25 km) |
| Grevenbroich to Mezdra | 970.02 mi (1,561.09 km) |
| Grevenbroich to Momchilgrad | 1,109.76 mi (1,785.98 km) |
