| Killingworth to Karlovo | 1,458.76 mi (2,347.65 km) |
| Killingworth to Karnobat | 1,538.33 mi (2,475.70 km) |
| Killingworth to Kavarna | 1,551.03 mi (2,496.14 km) |
| Killingworth to Kazanlak | 1,481.43 mi (2,384.13 km) |
| Killingworth to Knezha | 1,391.23 mi (2,238.98 km) |
| Killingworth to Kostinbrod | 1,393.60 mi (2,242.79 km) |
| Killingworth to Kozloduy | 1,365.06 mi (2,196.85 km) |
| Killingworth to Kyustendil | 1,401.70 mi (2,255.81 km) |
| Killingworth to Levski | 1,435.69 mi (2,310.52 km) |
| Killingworth to Lom | 1,345.17 mi (2,164.84 km) |
| Killingworth to Lovech | 1,431.69 mi (2,304.08 km) |
| Killingworth to Lukovit | 1,408.68 mi (2,267.06 km) |
| Killingworth to Lyaskovets | 1,469.67 mi (2,365.20 km) |
| Killingworth to Mezdra | 1,394.38 mi (2,244.04 km) |
| Killingworth to Momchilgrad | 1,535.56 mi (2,471.25 km) |
