| Frondenberg to Karlovo | 1,003.63 mi (1,615.19 km) |
| Frondenberg to Karnobat | 1,086.27 mi (1,748.19 km) |
| Frondenberg to Kavarna | 1,104.34 mi (1,777.26 km) |
| Frondenberg to Kazanlak | 1,026.95 mi (1,652.72 km) |
| Frondenberg to Knezha | 936.72 mi (1,507.50 km) |
| Frondenberg to Kostinbrod | 937.35 mi (1,508.52 km) |
| Frondenberg to Kozloduy | 910.64 mi (1,465.53 km) |
| Frondenberg to Kyustendil | 945.11 mi (1,521.01 km) |
| Frondenberg to Levski | 982.40 mi (1,581.02 km) |
| Frondenberg to Lom | 890.20 mi (1,432.64 km) |
| Frondenberg to Lovech | 977.29 mi (1,572.80 km) |
| Frondenberg to Lukovit | 953.72 mi (1,534.87 km) |
| Frondenberg to Lyaskovets | 1,016.67 mi (1,636.17 km) |
| Frondenberg to Mezdra | 938.85 mi (1,510.93 km) |
| Frondenberg to Momchilgrad | 1,079.64 mi (1,737.51 km) |
