| Rehlingen-Siersburg to Karlovo | 982.79 mi (1,581.65 km) |
| Rehlingen-Siersburg to Karnobat | 1,075.41 mi (1,730.70 km) |
| Rehlingen-Siersburg to Kavarna | 1,105.43 mi (1,779.03 km) |
| Rehlingen-Siersburg to Kazanlak | 1,008.75 mi (1,623.43 km) |
| Rehlingen-Siersburg to Knezha | 919.74 mi (1,480.18 km) |
| Rehlingen-Siersburg to Kostinbrod | 909.79 mi (1,464.17 km) |
| Rehlingen-Siersburg to Kozloduy | 894.54 mi (1,439.62 km) |
| Rehlingen-Siersburg to Kyustendil | 910.11 mi (1,464.67 km) |
| Rehlingen-Siersburg to Levski | 969.30 mi (1,559.94 km) |
| Rehlingen-Siersburg to Lom | 871.97 mi (1,403.30 km) |
| Rehlingen-Siersburg to Lovech | 960.18 mi (1,545.26 km) |
| Rehlingen-Siersburg to Lukovit | 934.47 mi (1,503.88 km) |
| Rehlingen-Siersburg to Lyaskovets | 1,003.97 mi (1,615.74 km) |
| Rehlingen-Siersburg to Mezdra | 916.77 mi (1,475.40 km) |
| Rehlingen-Siersburg to Momchilgrad | 1,053.07 mi (1,694.76 km) |
