| Frankfort to Karlovo | 5,323.03 mi (8,566.59 km) |
| Frankfort to Karnobat | 5,406.71 mi (8,701.26 km) |
| Frankfort to Kavarna | 5,420.15 mi (8,722.89 km) |
| Frankfort to Kazanlak | 5,347.07 mi (8,605.28 km) |
| Frankfort to Knezha | 5,256.89 mi (8,460.15 km) |
| Frankfort to Kostinbrod | 5,253.60 mi (8,454.85 km) |
| Frankfort to Kozloduy | 5,230.91 mi (8,418.34 km) |
| Frankfort to Kyustendil | 5,256.14 mi (8,458.94 km) |
| Frankfort to Levski | 5,303.02 mi (8,534.38 km) |
| Frankfort to Lom | 5,210.01 mi (8,384.69 km) |
| Frankfort to Lovech | 5,297.52 mi (8,525.54 km) |
| Frankfort to Lukovit | 5,273.44 mi (8,486.79 km) |
| Frankfort to Lyaskovets | 5,337.28 mi (8,589.53 km) |
| Frankfort to Mezdra | 5,257.65 mi (8,461.37 km) |
| Frankfort to Momchilgrad | 5,396.85 mi (8,685.39 km) |
