| Delaware to Karlovo | 5,153.64 mi (8,293.98 km) |
| Delaware to Karnobat | 5,236.64 mi (8,427.56 km) |
| Delaware to Kavarna | 5,249.36 mi (8,448.03 km) |
| Delaware to Kazanlak | 5,177.50 mi (8,332.38 km) |
| Delaware to Knezha | 5,087.30 mi (8,187.21 km) |
| Delaware to Kostinbrod | 5,084.64 mi (8,182.93 km) |
| Delaware to Kozloduy | 5,061.28 mi (8,145.35 km) |
| Delaware to Kyustendil | 5,087.66 mi (8,187.79 km) |
| Delaware to Levski | 5,133.16 mi (8,261.03 km) |
| Delaware to Lom | 5,040.50 mi (8,111.91 km) |
| Delaware to Lovech | 5,127.91 mi (8,252.58 km) |
| Delaware to Lukovit | 5,103.97 mi (8,214.05 km) |
| Delaware to Lyaskovets | 5,167.38 mi (8,316.10 km) |
| Delaware to Mezdra | 5,088.35 mi (8,188.91 km) |
| Delaware to Momchilgrad | 5,227.83 mi (8,413.37 km) |
