| Harlow to Karlovo | 1,309.99 mi (2,108.23 km) |
| Harlow to Karnobat | 1,399.08 mi (2,251.60 km) |
| Harlow to Kavarna | 1,423.29 mi (2,290.56 km) |
| Harlow to Kazanlak | 1,335.13 mi (2,148.68 km) |
| Harlow to Knezha | 1,245.41 mi (2,004.29 km) |
| Harlow to Kostinbrod | 1,238.78 mi (1,993.62 km) |
| Harlow to Kozloduy | 1,219.80 mi (1,963.08 km) |
| Harlow to Kyustendil | 1,240.73 mi (1,996.77 km) |
| Harlow to Levski | 1,293.62 mi (2,081.88 km) |
| Harlow to Lom | 1,197.94 mi (1,927.89 km) |
| Harlow to Lovech | 1,286.03 mi (2,069.66 km) |
| Harlow to Lukovit | 1,261.00 mi (2,029.39 km) |
| Harlow to Lyaskovets | 1,328.22 mi (2,137.57 km) |
| Harlow to Mezdra | 1,244.19 mi (2,002.33 km) |
| Harlow to Momchilgrad | 1,382.13 mi (2,224.32 km) |
