| Castelleone to Karlovo | 769.06 mi (1,237.69 km) |
| Castelleone to Karnobat | 874.21 mi (1,406.91 km) |
| Castelleone to Kavarna | 924.26 mi (1,487.45 km) |
| Castelleone to Kazanlak | 798.19 mi (1,284.56 km) |
| Castelleone to Knezha | 716.86 mi (1,153.67 km) |
| Castelleone to Kostinbrod | 688.83 mi (1,108.57 km) |
| Castelleone to Kozloduy | 695.09 mi (1,118.63 km) |
| Castelleone to Kyustendil | 676.42 mi (1,088.60 km) |
| Castelleone to Levski | 770.12 mi (1,239.39 km) |
| Castelleone to Lom | 670.36 mi (1,078.84 km) |
| Castelleone to Lovech | 754.38 mi (1,214.06 km) |
| Castelleone to Lukovit | 726.50 mi (1,169.19 km) |
| Castelleone to Lyaskovets | 803.40 mi (1,292.95 km) |
| Castelleone to Mezdra | 704.97 mi (1,134.54 km) |
| Castelleone to Momchilgrad | 826.05 mi (1,329.40 km) |
