| Castelnaudary to Karlovo | 1,152.51 mi (1,854.78 km) |
| Castelnaudary to Karnobat | 1,261.42 mi (2,030.06 km) |
| Castelnaudary to Kavarna | 1,319.26 mi (2,123.15 km) |
| Castelnaudary to Kazanlak | 1,182.49 mi (1,903.04 km) |
| Castelnaudary to Knezha | 1,107.55 mi (1,782.43 km) |
| Castelnaudary to Kostinbrod | 1,070.92 mi (1,723.48 km) |
| Castelnaudary to Kozloduy | 1,087.96 mi (1,750.90 km) |
| Castelnaudary to Kyustendil | 1,050.60 mi (1,690.78 km) |
| Castelnaudary to Levski | 1,160.98 mi (1,868.42 km) |
| Castelnaudary to Lom | 1,063.07 mi (1,710.84 km) |
| Castelnaudary to Lovech | 1,142.53 mi (1,838.72 km) |
| Castelnaudary to Lukovit | 1,114.42 mi (1,793.49 km) |
| Castelnaudary to Lyaskovets | 1,192.72 mi (1,919.50 km) |
| Castelnaudary to Mezdra | 1,091.63 mi (1,756.80 km) |
| Castelnaudary to Momchilgrad | 1,198.99 mi (1,929.58 km) |
