| Castelfidardo to Karlovo | 570.92 mi (918.81 km) |
| Castelfidardo to Karnobat | 680.14 mi (1,094.59 km) |
| Castelfidardo to Kavarna | 740.77 mi (1,192.15 km) |
| Castelfidardo to Kazanlak | 600.94 mi (967.13 km) |
| Castelfidardo to Knezha | 527.92 mi (849.60 km) |
| Castelfidardo to Kostinbrod | 489.32 mi (787.49 km) |
| Castelfidardo to Kozloduy | 509.67 mi (820.24 km) |
| Castelfidardo to Kyustendil | 469.55 mi (755.67 km) |
| Castelfidardo to Levski | 581.12 mi (935.22 km) |
| Castelfidardo to Lom | 484.92 mi (780.40 km) |
| Castelfidardo to Lovech | 561.77 mi (904.09 km) |
| Castelfidardo to Lukovit | 533.72 mi (858.93 km) |
| Castelfidardo to Lyaskovets | 612.14 mi (985.15 km) |
| Castelfidardo to Mezdra | 510.67 mi (821.84 km) |
| Castelfidardo to Momchilgrad | 618.67 mi (995.66 km) |
