| Stockton-on-Tees to Karlovo | 1,436.97 mi (2,312.57 km) |
| Stockton-on-Tees to Karnobat | 1,517.88 mi (2,442.79 km) |
| Stockton-on-Tees to Kavarna | 1,532.13 mi (2,465.72 km) |
| Stockton-on-Tees to Kazanlak | 1,459.98 mi (2,349.61 km) |
| Stockton-on-Tees to Knezha | 1,369.75 mi (2,204.40 km) |
| Stockton-on-Tees to Kostinbrod | 1,370.94 mi (2,206.31 km) |
| Stockton-on-Tees to Kozloduy | 1,343.62 mi (2,162.34 km) |
| Stockton-on-Tees to Kyustendil | 1,378.23 mi (2,218.05 km) |
| Stockton-on-Tees to Levski | 1,414.75 mi (2,276.82 km) |
| Stockton-on-Tees to Lom | 1,323.45 mi (2,129.88 km) |
| Stockton-on-Tees to Lovech | 1,410.27 mi (2,269.61 km) |
| Stockton-on-Tees to Lukovit | 1,386.98 mi (2,232.12 km) |
| Stockton-on-Tees to Lyaskovets | 1,448.85 mi (2,331.70 km) |
| Stockton-on-Tees to Mezdra | 1,372.33 mi (2,208.55 km) |
| Stockton-on-Tees to Momchilgrad | 1,513.22 mi (2,435.29 km) |
