| Santander to Karlovo | 1,438.56 mi (2,315.14 km) |
| Santander to Karnobat | 1,546.74 mi (2,489.24 km) |
| Santander to Kavarna | 1,601.97 mi (2,578.12 km) |
| Santander to Kazanlak | 1,468.41 mi (2,363.17 km) |
| Santander to Knezha | 1,391.54 mi (2,239.47 km) |
| Santander to Kostinbrod | 1,357.08 mi (2,184.01 km) |
| Santander to Kozloduy | 1,371.16 mi (2,206.66 km) |
| Santander to Kyustendil | 1,338.07 mi (2,153.42 km) |
| Santander to Levski | 1,445.03 mi (2,325.54 km) |
| Santander to Lom | 1,346.27 mi (2,166.62 km) |
| Santander to Lovech | 1,427.37 mi (2,297.13 km) |
| Santander to Lukovit | 1,399.27 mi (2,251.91 km) |
| Santander to Lyaskovets | 1,477.32 mi (2,377.51 km) |
| Santander to Mezdra | 1,376.77 mi (2,215.70 km) |
| Santander to Momchilgrad | 1,486.91 mi (2,392.95 km) |
