| Kaiserslautern to Karlovo | 939.49 mi (1,511.96 km) |
| Kaiserslautern to Karnobat | 1,030.73 mi (1,658.80 km) |
| Kaiserslautern to Kavarna | 1,059.26 mi (1,704.72 km) |
| Kaiserslautern to Kazanlak | 965.07 mi (1,553.13 km) |
| Kaiserslautern to Knezha | 875.72 mi (1,409.34 km) |
| Kaiserslautern to Kostinbrod | 867.49 mi (1,396.08 km) |
| Kaiserslautern to Kozloduy | 850.35 mi (1,368.51 km) |
| Kaiserslautern to Kyustendil | 869.17 mi (1,398.80 km) |
| Kaiserslautern to Levski | 924.80 mi (1,488.32 km) |
| Kaiserslautern to Lom | 828.06 mi (1,332.63 km) |
| Kaiserslautern to Lovech | 916.25 mi (1,474.57 km) |
| Kaiserslautern to Lukovit | 890.83 mi (1,433.65 km) |
| Kaiserslautern to Lyaskovets | 959.46 mi (1,544.11 km) |
| Kaiserslautern to Mezdra | 873.55 mi (1,405.85 km) |
| Kaiserslautern to Momchilgrad | 1,010.84 mi (1,626.79 km) |
