| Key West to Karlovo | 5,859.00 mi (9,429.14 km) |
| Key West to Karnobat | 5,955.49 mi (9,584.43 km) |
| Key West to Kavarna | 5,985.81 mi (9,633.23 km) |
| Key West to Kazanlak | 5,886.23 mi (9,472.97 km) |
| Key West to Knezha | 5,798.56 mi (9,331.88 km) |
| Key West to Kostinbrod | 5,782.30 mi (9,305.72 km) |
| Key West to Kozloduy | 5,773.88 mi (9,292.16 km) |
| Key West to Kyustendil | 5,775.43 mi (9,294.65 km) |
| Key West to Levski | 5,849.18 mi (9,413.35 km) |
| Key West to Lom | 5,750.67 mi (9,254.81 km) |
| Key West to Lovech | 5,838.62 mi (9,396.35 km) |
| Key West to Lukovit | 5,812.11 mi (9,353.69 km) |
| Key West to Lyaskovets | 5,883.81 mi (9,469.08 km) |
| Key West to Mezdra | 5,793.05 mi (9,323.01 km) |
| Key West to Momchilgrad | 5,923.67 mi (9,533.22 km) |
