| Leiden to Karlovo | 1,149.15 mi (1,849.37 km) |
| Leiden to Karnobat | 1,233.17 mi (1,984.59 km) |
| Leiden to Kavarna | 1,252.02 mi (2,014.92 km) |
| Leiden to Kazanlak | 1,172.90 mi (1,887.59 km) |
| Leiden to Knezha | 1,082.70 mi (1,742.43 km) |
| Leiden to Kostinbrod | 1,081.55 mi (1,740.59 km) |
| Leiden to Kozloduy | 1,056.70 mi (1,700.59 km) |
| Leiden to Kyustendil | 1,087.71 mi (1,750.49 km) |
| Leiden to Levski | 1,128.94 mi (1,816.86 km) |
| Leiden to Lom | 1,035.92 mi (1,667.14 km) |
| Leiden to Lovech | 1,123.32 mi (1,807.80 km) |
| Leiden to Lukovit | 1,099.40 mi (1,769.32 km) |
| Leiden to Lyaskovets | 1,163.30 mi (1,872.15 km) |
| Leiden to Mezdra | 1,084.05 mi (1,744.61 km) |
| Leiden to Momchilgrad | 1,224.29 mi (1,970.30 km) |
