| Cities | Distance |
|---|
| Regen to Karlovo | 710.72 mi (1,143.79 km) |
| Regen to Karnobat | 795.97 mi (1,280.99 km) |
| Regen to Kavarna | 819.26 mi (1,318.47 km) |
| Regen to Kazanlak | 734.55 mi (1,182.14 km) |
| Regen to Knezha | 644.38 mi (1,037.03 km) |
| Regen to Kostinbrod | 643.77 mi (1,036.05 km) |
| Regen to Kozloduy | 618.43 mi (995.27 km) |
| Regen to Kyustendil | 651.87 mi (1,049.08 km) |
| Regen to Levski | 691.15 mi (1,112.30 km) |
| Regen to Lom | 597.51 mi (961.60 km) |
| Regen to Lovech | 685.02 mi (1,102.43 km) |
| Regen to Lukovit | 660.98 mi (1,063.75 km) |
| Regen to Lyaskovets | 725.62 mi (1,167.78 km) |
| Regen to Mezdra | 645.66 mi (1,039.09 km) |
| Regen to Momchilgrad | 786.17 mi (1,265.22 km) |
