| Southend to Karlovo | 1,281.25 mi (2,061.97 km) |
| Southend to Karnobat | 1,370.70 mi (2,205.93 km) |
| Southend to Kavarna | 1,395.47 mi (2,245.79 km) |
| Southend to Kazanlak | 1,306.47 mi (2,102.56 km) |
| Southend to Knezha | 1,216.81 mi (1,958.27 km) |
| Southend to Kostinbrod | 1,209.83 mi (1,947.03 km) |
| Southend to Kozloduy | 1,191.23 mi (1,917.11 km) |
| Southend to Kyustendil | 1,211.58 mi (1,949.85 km) |
| Southend to Levski | 1,265.16 mi (2,036.08 km) |
| Southend to Lom | 1,169.30 mi (1,881.81 km) |
| Southend to Lovech | 1,257.41 mi (2,023.61 km) |
| Southend to Lukovit | 1,232.32 mi (1,983.22 km) |
| Southend to Lyaskovets | 1,299.78 mi (2,091.79 km) |
| Southend to Mezdra | 1,215.41 mi (1,956.01 km) |
| Southend to Momchilgrad | 1,353.18 mi (2,177.73 km) |
