| Thetford to Karlovo | 1,300.78 mi (2,093.41 km) |
| Thetford to Karnobat | 1,387.35 mi (2,232.72 km) |
| Thetford to Kavarna | 1,408.53 mi (2,266.82 km) |
| Thetford to Kazanlak | 1,325.25 mi (2,132.79 km) |
| Thetford to Knezha | 1,235.22 mi (1,987.90 km) |
| Thetford to Kostinbrod | 1,231.22 mi (1,981.46 km) |
| Thetford to Kozloduy | 1,209.40 mi (1,946.34 km) |
| Thetford to Kyustendil | 1,235.07 mi (1,987.65 km) |
| Thetford to Levski | 1,282.47 mi (2,063.93 km) |
| Thetford to Lom | 1,188.05 mi (1,911.99 km) |
| Thetford to Lovech | 1,275.87 mi (2,053.32 km) |
| Thetford to Lukovit | 1,251.38 mi (2,013.90 km) |
| Thetford to Lyaskovets | 1,316.97 mi (2,119.45 km) |
| Thetford to Mezdra | 1,235.27 mi (1,987.97 km) |
| Thetford to Momchilgrad | 1,374.41 mi (2,211.90 km) |
