| Friedrichsdorf to Karlovo | 929.05 mi (1,495.16 km) |
| Friedrichsdorf to Karnobat | 1,015.76 mi (1,634.71 km) |
| Friedrichsdorf to Kavarna | 1,038.90 mi (1,671.95 km) |
| Friedrichsdorf to Kazanlak | 953.42 mi (1,534.39 km) |
| Friedrichsdorf to Knezha | 863.39 mi (1,389.48 km) |
| Friedrichsdorf to Kostinbrod | 860.17 mi (1,384.31 km) |
| Friedrichsdorf to Kozloduy | 837.56 mi (1,347.92 km) |
| Friedrichsdorf to Kyustendil | 865.47 mi (1,392.84 km) |
| Friedrichsdorf to Levski | 910.72 mi (1,465.66 km) |
| Friedrichsdorf to Lom | 816.24 mi (1,313.60 km) |
| Friedrichsdorf to Lovech | 904.04 mi (1,454.91 km) |
| Friedrichsdorf to Lukovit | 879.59 mi (1,415.56 km) |
| Friedrichsdorf to Lyaskovets | 945.24 mi (1,521.22 km) |
| Friedrichsdorf to Mezdra | 863.62 mi (1,389.87 km) |
| Friedrichsdorf to Momchilgrad | 1,003.19 mi (1,614.47 km) |
