| Louth to Karlovo | 1,354.71 mi (2,180.19 km) |
| Louth to Karnobat | 1,438.61 mi (2,315.22 km) |
| Louth to Kavarna | 1,456.50 mi (2,344.01 km) |
| Louth to Kazanlak | 1,378.49 mi (2,218.47 km) |
| Louth to Knezha | 1,288.29 mi (2,073.30 km) |
| Louth to Kostinbrod | 1,286.82 mi (2,070.94 km) |
| Louth to Kozloduy | 1,262.29 mi (2,031.46 km) |
| Louth to Kyustendil | 1,292.37 mi (2,079.87 km) |
| Louth to Levski | 1,334.49 mi (2,147.65 km) |
| Louth to Lom | 1,241.50 mi (1,998.00 km) |
| Louth to Lovech | 1,328.91 mi (2,138.68 km) |
| Louth to Lukovit | 1,304.98 mi (2,100.17 km) |
| Louth to Lyaskovets | 1,368.82 mi (2,202.91 km) |
| Louth to Mezdra | 1,289.57 mi (2,075.36 km) |
| Louth to Momchilgrad | 1,429.67 mi (2,300.83 km) |
