| Langenfeld to Karlovo | 1,022.33 mi (1,645.28 km) |
| Langenfeld to Karnobat | 1,107.60 mi (1,782.50 km) |
| Langenfeld to Kavarna | 1,128.52 mi (1,816.17 km) |
| Langenfeld to Kazanlak | 1,046.36 mi (1,683.95 km) |
| Langenfeld to Knezha | 956.22 mi (1,538.88 km) |
| Langenfeld to Kostinbrod | 954.18 mi (1,535.60 km) |
| Langenfeld to Kozloduy | 930.29 mi (1,497.15 km) |
| Langenfeld to Kyustendil | 960.02 mi (1,545.00 km) |
| Langenfeld to Levski | 1,002.96 mi (1,614.12 km) |
| Langenfeld to Lom | 909.26 mi (1,463.31 km) |
| Langenfeld to Lovech | 996.86 mi (1,604.29 km) |
| Langenfeld to Lukovit | 972.70 mi (1,565.41 km) |
| Langenfeld to Lyaskovets | 1,037.41 mi (1,669.54 km) |
| Langenfeld to Mezdra | 957.08 mi (1,540.27 km) |
| Langenfeld to Momchilgrad | 1,097.04 mi (1,765.52 km) |
