| Caldwell to Karlovo | 6,015.69 mi (9,681.32 km) |
| Caldwell to Karnobat | 6,065.04 mi (9,760.74 km) |
| Caldwell to Kavarna | 6,043.74 mi (9,726.46 km) |
| Caldwell to Kazanlak | 6,030.86 mi (9,705.74 km) |
| Caldwell to Knezha | 5,946.37 mi (9,569.76 km) |
| Caldwell to Kostinbrod | 5,967.99 mi (9,604.55 km) |
| Caldwell to Kozloduy | 5,920.94 mi (9,528.83 km) |
| Caldwell to Kyustendil | 5,987.77 mi (9,636.38 km) |
| Caldwell to Levski | 5,978.48 mi (9,621.44 km) |
| Caldwell to Lom | 5,906.85 mi (9,506.16 km) |
| Caldwell to Lovech | 5,983.36 mi (9,629.29 km) |
| Caldwell to Lukovit | 5,966.72 mi (9,602.50 km) |
| Caldwell to Lyaskovets | 6,008.06 mi (9,669.04 km) |
| Caldwell to Mezdra | 5,958.96 mi (9,590.02 km) |
| Caldwell to Momchilgrad | 6,098.27 mi (9,814.22 km) |
