| Darby to Karlovo | 4,861.41 mi (7,823.68 km) |
| Darby to Karnobat | 4,949.86 mi (7,966.02 km) |
| Darby to Kavarna | 4,969.40 mi (7,997.48 km) |
| Darby to Kazanlak | 4,886.63 mi (7,864.28 km) |
| Darby to Knezha | 4,796.89 mi (7,719.85 km) |
| Darby to Kostinbrod | 4,789.25 mi (7,707.55 km) |
| Darby to Kozloduy | 4,771.24 mi (7,678.56 km) |
| Darby to Kyustendil | 4,788.76 mi (7,706.76 km) |
| Darby to Levski | 4,844.78 mi (7,796.91 km) |
| Darby to Lom | 4,749.44 mi (7,643.49 km) |
| Darby to Lovech | 4,837.52 mi (7,785.23 km) |
| Darby to Lukovit | 4,812.50 mi (7,744.97 km) |
| Darby to Lyaskovets | 4,879.33 mi (7,852.52 km) |
| Darby to Mezdra | 4,795.53 mi (7,717.66 km) |
| Darby to Momchilgrad | 4,932.54 mi (7,938.16 km) |
