| Castel San Giovanni to Karlovo | 782.62 mi (1,259.51 km) |
| Castel San Giovanni to Karnobat | 888.53 mi (1,429.94 km) |
| Castel San Giovanni to Kavarna | 939.99 mi (1,512.77 km) |
| Castel San Giovanni to Kazanlak | 811.93 mi (1,306.67 km) |
| Castel San Giovanni to Knezha | 731.58 mi (1,177.36 km) |
| Castel San Giovanni to Kostinbrod | 702.03 mi (1,129.81 km) |
| Castel San Giovanni to Kozloduy | 710.18 mi (1,142.93 km) |
| Castel San Giovanni to Kyustendil | 688.36 mi (1,107.82 km) |
| Castel San Giovanni to Levski | 784.94 mi (1,263.24 km) |
| Castel San Giovanni to Lom | 685.39 mi (1,103.03 km) |
| Castel San Giovanni to Lovech | 768.70 mi (1,237.10 km) |
| Castel San Giovanni to Lukovit | 740.74 mi (1,192.11 km) |
| Castel San Giovanni to Lyaskovets | 817.99 mi (1,316.43 km) |
| Castel San Giovanni to Mezdra | 718.96 mi (1,157.05 km) |
| Castel San Giovanni to Momchilgrad | 838.12 mi (1,348.83 km) |
