| Horb am Neckar to Karlovo | 874.46 mi (1,407.30 km) |
| Horb am Neckar to Karnobat | 968.89 mi (1,559.27 km) |
| Horb am Neckar to Kavarna | 1,001.87 mi (1,612.35 km) |
| Horb am Neckar to Kazanlak | 900.86 mi (1,449.79 km) |
| Horb am Neckar to Knezha | 812.37 mi (1,307.38 km) |
| Horb am Neckar to Kostinbrod | 800.49 mi (1,288.27 km) |
| Horb am Neckar to Kozloduy | 787.45 mi (1,267.28 km) |
| Horb am Neckar to Kyustendil | 799.79 mi (1,287.14 km) |
| Horb am Neckar to Levski | 862.61 mi (1,388.23 km) |
| Horb am Neckar to Lom | 764.51 mi (1,230.35 km) |
| Horb am Neckar to Lovech | 852.64 mi (1,372.20 km) |
| Horb am Neckar to Lukovit | 826.58 mi (1,330.25 km) |
| Horb am Neckar to Lyaskovets | 897.25 mi (1,443.99 km) |
| Horb am Neckar to Mezdra | 808.39 mi (1,300.98 km) |
| Horb am Neckar to Momchilgrad | 943.63 mi (1,518.63 km) |
