| London Colney to Karlovo | 1,326.17 mi (2,134.26 km) |
| London Colney to Karnobat | 1,415.69 mi (2,278.33 km) |
| London Colney to Kavarna | 1,440.38 mi (2,318.07 km) |
| London Colney to Kazanlak | 1,351.41 mi (2,174.89 km) |
| London Colney to Knezha | 1,261.77 mi (2,030.62 km) |
| London Colney to Kostinbrod | 1,254.65 mi (2,019.16 km) |
| London Colney to Kozloduy | 1,236.20 mi (1,989.47 km) |
| London Colney to Kyustendil | 1,256.23 mi (2,021.70 km) |
| London Colney to Levski | 1,310.14 mi (2,108.46 km) |
| London Colney to Lom | 1,214.25 mi (1,954.15 km) |
| London Colney to Lovech | 1,302.37 mi (2,095.96 km) |
| London Colney to Lukovit | 1,277.26 mi (2,055.55 km) |
| London Colney to Lyaskovets | 1,344.76 mi (2,164.18 km) |
| London Colney to Mezdra | 1,260.32 mi (2,028.29 km) |
| London Colney to Momchilgrad | 1,398.00 mi (2,249.87 km) |
