| Caister-on-Sea to Karlovo | 1,268.70 mi (2,041.78 km) |
| Caister-on-Sea to Karnobat | 1,353.62 mi (2,178.45 km) |
| Caister-on-Sea to Kavarna | 1,373.01 mi (2,209.64 km) |
| Caister-on-Sea to Kazanlak | 1,292.73 mi (2,080.45 km) |
| Caister-on-Sea to Knezha | 1,202.58 mi (1,935.36 km) |
| Caister-on-Sea to Kostinbrod | 1,200.28 mi (1,931.66 km) |
| Caister-on-Sea to Kozloduy | 1,176.64 mi (1,893.61 km) |
| Caister-on-Sea to Kyustendil | 1,205.38 mi (1,939.88 km) |
| Caister-on-Sea to Levski | 1,249.18 mi (2,010.36 km) |
| Caister-on-Sea to Lom | 1,155.64 mi (1,859.83 km) |
| Caister-on-Sea to Lovech | 1,243.22 mi (2,000.77 km) |
| Caister-on-Sea to Lukovit | 1,219.08 mi (1,961.92 km) |
| Caister-on-Sea to Lyaskovets | 1,283.59 mi (2,065.73 km) |
| Caister-on-Sea to Mezdra | 1,203.43 mi (1,936.73 km) |
| Caister-on-Sea to Momchilgrad | 1,343.24 mi (2,161.74 km) |
