| Seaham to Karlovo | 1,445.42 mi (2,326.18 km) |
| Seaham to Karnobat | 1,525.45 mi (2,454.98 km) |
| Seaham to Kavarna | 1,538.70 mi (2,476.29 km) |
| Seaham to Kazanlak | 1,468.21 mi (2,362.85 km) |
| Seaham to Knezha | 1,378.00 mi (2,217.67 km) |
| Seaham to Kostinbrod | 1,379.97 mi (2,220.85 km) |
| Seaham to Kozloduy | 1,351.83 mi (2,175.57 km) |
| Seaham to Kyustendil | 1,387.81 mi (2,233.47 km) |
| Seaham to Levski | 1,422.64 mi (2,289.52 km) |
| Seaham to Lom | 1,331.85 mi (2,143.41 km) |
| Seaham to Lovech | 1,418.47 mi (2,282.81 km) |
| Seaham to Lukovit | 1,395.37 mi (2,245.64 km) |
| Seaham to Lyaskovets | 1,456.66 mi (2,344.27 km) |
| Seaham to Mezdra | 1,380.95 mi (2,222.43 km) |
| Seaham to Momchilgrad | 1,522.04 mi (2,449.49 km) |
