| Castres to Karlovo | 1,136.01 mi (1,828.23 km) |
| Castres to Karnobat | 1,244.61 mi (2,003.01 km) |
| Castres to Kavarna | 1,301.54 mi (2,094.63 km) |
| Castres to Kazanlak | 1,165.93 mi (1,876.39 km) |
| Castres to Knezha | 1,090.21 mi (1,754.52 km) |
| Castres to Kostinbrod | 1,054.46 mi (1,696.99 km) |
| Castres to Kozloduy | 1,070.34 mi (1,722.55 km) |
| Castres to Kyustendil | 1,034.88 mi (1,665.47 km) |
| Castres to Levski | 1,143.67 mi (1,840.55 km) |
| Castres to Lom | 1,045.45 mi (1,682.48 km) |
| Castres to Lovech | 1,125.51 mi (1,811.33 km) |
| Castres to Lukovit | 1,097.40 mi (1,766.10 km) |
| Castres to Lyaskovets | 1,175.61 mi (1,891.97 km) |
| Castres to Mezdra | 1,074.72 mi (1,729.59 km) |
| Castres to Momchilgrad | 1,183.59 mi (1,904.80 km) |
