| Caldas de Reyes to Karlovo | 1,689.13 mi (2,718.39 km) |
| Caldas de Reyes to Karnobat | 1,797.54 mi (2,892.86 km) |
| Caldas de Reyes to Kavarna | 1,853.13 mi (2,982.33 km) |
| Caldas de Reyes to Kazanlak | 1,719.03 mi (2,766.51 km) |
| Caldas de Reyes to Knezha | 1,642.57 mi (2,643.47 km) |
| Caldas de Reyes to Kostinbrod | 1,607.61 mi (2,587.19 km) |
| Caldas de Reyes to Kozloduy | 1,622.27 mi (2,610.79 km) |
| Caldas de Reyes to Kyustendil | 1,587.96 mi (2,555.58 km) |
| Caldas de Reyes to Levski | 1,696.05 mi (2,729.54 km) |
| Caldas de Reyes to Lom | 1,597.39 mi (2,570.74 km) |
| Caldas de Reyes to Lovech | 1,678.26 mi (2,700.91 km) |
| Caldas de Reyes to Lukovit | 1,650.16 mi (2,655.68 km) |
| Caldas de Reyes to Lyaskovets | 1,728.26 mi (2,781.37 km) |
| Caldas de Reyes to Mezdra | 1,627.59 mi (2,619.35 km) |
| Caldas de Reyes to Momchilgrad | 1,736.47 mi (2,794.57 km) |
