| Thornton Heath to Karlovo | 1,311.39 mi (2,110.48 km) |
| Thornton Heath to Karnobat | 1,401.84 mi (2,256.04 km) |
| Thornton Heath to Kavarna | 1,427.74 mi (2,297.73 km) |
| Thornton Heath to Kazanlak | 1,336.88 mi (2,151.50 km) |
| Thornton Heath to Knezha | 1,247.40 mi (2,007.50 km) |
| Thornton Heath to Kostinbrod | 1,239.30 mi (1,994.46 km) |
| Thornton Heath to Kozloduy | 1,221.93 mi (1,966.50 km) |
| Thornton Heath to Kyustendil | 1,240.20 mi (1,995.91 km) |
| Thornton Heath to Levski | 1,296.11 mi (2,085.89 km) |
| Thornton Heath to Lom | 1,199.79 mi (1,930.88 km) |
| Thornton Heath to Lovech | 1,287.97 mi (2,072.78 km) |
| Thornton Heath to Lukovit | 1,262.66 mi (2,032.06 km) |
| Thornton Heath to Lyaskovets | 1,330.76 mi (2,141.65 km) |
| Thornton Heath to Mezdra | 1,245.47 mi (2,004.39 km) |
| Thornton Heath to Momchilgrad | 1,382.64 mi (2,225.15 km) |
