| Mettmann to Karlovo | 1,026.04 mi (1,651.26 km) |
| Mettmann to Karnobat | 1,110.73 mi (1,787.55 km) |
| Mettmann to Kavarna | 1,130.97 mi (1,820.13 km) |
| Mettmann to Kazanlak | 1,049.92 mi (1,689.69 km) |
| Mettmann to Knezha | 959.75 mi (1,544.56 km) |
| Mettmann to Kostinbrod | 958.28 mi (1,542.20 km) |
| Mettmann to Kozloduy | 933.78 mi (1,502.78 km) |
| Mettmann to Kyustendil | 964.51 mi (1,552.23 km) |
| Mettmann to Levski | 1,006.26 mi (1,619.43 km) |
| Mettmann to Lom | 912.88 mi (1,469.14 km) |
| Mettmann to Lovech | 1,000.38 mi (1,609.95 km) |
| Mettmann to Lukovit | 976.35 mi (1,571.28 km) |
| Mettmann to Lyaskovets | 1,040.67 mi (1,674.80 km) |
| Mettmann to Mezdra | 960.88 mi (1,546.39 km) |
| Mettmann to Momchilgrad | 1,101.04 mi (1,771.95 km) |
