| Thornton to Karlovo | 1,435.79 mi (2,310.68 km) |
| Thornton to Karnobat | 1,519.67 mi (2,445.67 km) |
| Thornton to Kavarna | 1,537.28 mi (2,474.01 km) |
| Thornton to Kazanlak | 1,459.59 mi (2,348.98 km) |
| Thornton to Knezha | 1,369.39 mi (2,203.82 km) |
| Thornton to Kostinbrod | 1,367.80 mi (2,201.26 km) |
| Thornton to Kozloduy | 1,343.39 mi (2,161.98 km) |
| Thornton to Kyustendil | 1,373.15 mi (2,209.86 km) |
| Thornton to Levski | 1,415.58 mi (2,278.16 km) |
| Thornton to Lom | 1,322.59 mi (2,128.51 km) |
| Thornton to Lovech | 1,410.01 mi (2,269.20 km) |
| Thornton to Lukovit | 1,386.07 mi (2,230.67 km) |
| Thornton to Lyaskovets | 1,449.91 mi (2,333.41 km) |
| Thornton to Mezdra | 1,370.64 mi (2,205.82 km) |
| Thornton to Momchilgrad | 1,510.68 mi (2,431.21 km) |
