| Castellanza to Karlovo | 813.66 mi (1,309.46 km) |
| Castellanza to Karnobat | 918.11 mi (1,477.56 km) |
| Castellanza to Kavarna | 966.63 mi (1,555.64 km) |
| Castellanza to Kazanlak | 842.62 mi (1,356.07 km) |
| Castellanza to Knezha | 760.45 mi (1,223.82 km) |
| Castellanza to Kostinbrod | 733.75 mi (1,180.86 km) |
| Castellanza to Kozloduy | 738.30 mi (1,188.18 km) |
| Castellanza to Kyustendil | 722.17 mi (1,162.23 km) |
| Castellanza to Levski | 813.58 mi (1,309.32 km) |
| Castellanza to Lom | 713.67 mi (1,148.53 km) |
| Castellanza to Lovech | 798.33 mi (1,284.78 km) |
| Castellanza to Lukovit | 770.54 mi (1,240.06 km) |
| Castellanza to Lyaskovets | 847.07 mi (1,363.23 km) |
| Castellanza to Mezdra | 749.24 mi (1,205.79 km) |
| Castellanza to Momchilgrad | 871.67 mi (1,402.82 km) |
