| Walton upon Thames to Karlovo | 1,323.65 mi (2,130.20 km) |
| Walton upon Thames to Karnobat | 1,414.31 mi (2,276.11 km) |
| Walton upon Thames to Kavarna | 1,440.44 mi (2,318.17 km) |
| Walton upon Thames to Kazanlak | 1,349.19 mi (2,171.31 km) |
| Walton upon Thames to Knezha | 1,259.76 mi (2,027.38 km) |
| Walton upon Thames to Kostinbrod | 1,251.40 mi (2,013.94 km) |
| Walton upon Thames to Kozloduy | 1,234.31 mi (1,986.43 km) |
| Walton upon Thames to Kyustendil | 1,252.10 mi (2,015.07 km) |
| Walton upon Thames to Levski | 1,308.55 mi (2,105.90 km) |
| Walton upon Thames to Lom | 1,212.13 mi (1,950.73 km) |
| Walton upon Thames to Lovech | 1,300.31 mi (2,092.65 km) |
| Walton upon Thames to Lukovit | 1,274.96 mi (2,051.86 km) |
| Walton upon Thames to Lyaskovets | 1,343.19 mi (2,161.66 km) |
| Walton upon Thames to Mezdra | 1,257.71 mi (2,024.09 km) |
| Walton upon Thames to Momchilgrad | 1,394.74 mi (2,244.61 km) |
