| Waltham Cross to Karlovo | 1,314.45 mi (2,115.40 km) |
| Waltham Cross to Karnobat | 1,403.94 mi (2,259.42 km) |
| Waltham Cross to Kavarna | 1,428.63 mi (2,299.16 km) |
| Waltham Cross to Kazanlak | 1,339.69 mi (2,156.02 km) |
| Waltham Cross to Knezha | 1,250.04 mi (2,011.74 km) |
| Waltham Cross to Kostinbrod | 1,242.97 mi (2,000.36 km) |
| Waltham Cross to Kozloduy | 1,224.46 mi (1,970.59 km) |
| Waltham Cross to Kyustendil | 1,244.61 mi (2,003.00 km) |
| Waltham Cross to Levski | 1,298.39 mi (2,089.56 km) |
| Waltham Cross to Lom | 1,202.52 mi (1,935.27 km) |
| Waltham Cross to Lovech | 1,290.64 mi (2,077.08 km) |
| Waltham Cross to Lukovit | 1,265.53 mi (2,036.68 km) |
| Waltham Cross to Lyaskovets | 1,333.01 mi (2,145.28 km) |
| Waltham Cross to Mezdra | 1,248.61 mi (2,009.44 km) |
| Waltham Cross to Momchilgrad | 1,386.32 mi (2,231.07 km) |
