| Harrow on the Hill to Karlovo | 1,324.06 mi (2,130.87 km) |
| Harrow on the Hill to Karnobat | 1,414.11 mi (2,275.79 km) |
| Harrow on the Hill to Kavarna | 1,439.48 mi (2,316.61 km) |
| Harrow on the Hill to Kazanlak | 1,349.44 mi (2,171.72 km) |
| Harrow on the Hill to Knezha | 1,259.89 mi (2,027.60 km) |
| Harrow on the Hill to Kostinbrod | 1,252.20 mi (2,015.23 km) |
| Harrow on the Hill to Kozloduy | 1,234.38 mi (1,986.54 km) |
| Harrow on the Hill to Kyustendil | 1,253.38 mi (2,017.12 km) |
| Harrow on the Hill to Levski | 1,308.46 mi (2,105.76 km) |
| Harrow on the Hill to Lom | 1,212.32 mi (1,951.04 km) |
| Harrow on the Hill to Lovech | 1,300.48 mi (2,092.91 km) |
| Harrow on the Hill to Lukovit | 1,275.25 mi (2,052.32 km) |
| Harrow on the Hill to Lyaskovets | 1,343.09 mi (2,161.50 km) |
| Harrow on the Hill to Mezdra | 1,258.17 mi (2,024.82 km) |
| Harrow on the Hill to Momchilgrad | 1,395.55 mi (2,245.93 km) |
