| Altena to Karlovo | 1,001.32 mi (1,611.47 km) |
| Altena to Karnobat | 1,084.84 mi (1,745.89 km) |
| Altena to Kavarna | 1,103.91 mi (1,776.57 km) |
| Altena to Kazanlak | 1,024.87 mi (1,649.37 km) |
| Altena to Knezha | 934.65 mi (1,504.18 km) |
| Altena to Kostinbrod | 934.43 mi (1,503.82 km) |
| Altena to Kozloduy | 908.62 mi (1,462.28 km) |
| Altena to Kyustendil | 941.60 mi (1,515.36 km) |
| Altena to Levski | 980.70 mi (1,578.28 km) |
| Altena to Lom | 887.98 mi (1,429.07 km) |
| Altena to Lovech | 975.26 mi (1,569.53 km) |
| Altena to Lukovit | 951.49 mi (1,531.28 km) |
| Altena to Lyaskovets | 1,015.03 mi (1,633.53 km) |
| Altena to Mezdra | 936.37 mi (1,506.95 km) |
| Altena to Momchilgrad | 1,076.92 mi (1,733.14 km) |
