| Unna to Karlovo | 1,008.69 mi (1,623.34 km) |
| Unna to Karnobat | 1,091.18 mi (1,756.08 km) |
| Unna to Kavarna | 1,109.04 mi (1,784.83 km) |
| Unna to Kazanlak | 1,031.97 mi (1,660.80 km) |
| Unna to Knezha | 941.74 mi (1,515.58 km) |
| Unna to Kostinbrod | 942.51 mi (1,516.82 km) |
| Unna to Kozloduy | 915.65 mi (1,473.60 km) |
| Unna to Kyustendil | 950.35 mi (1,529.44 km) |
| Unna to Levski | 987.36 mi (1,589.00 km) |
| Unna to Lom | 895.25 mi (1,440.76 km) |
| Unna to Lovech | 982.31 mi (1,580.87 km) |
| Unna to Lukovit | 958.77 mi (1,543.00 km) |
| Unna to Lyaskovets | 1,021.61 mi (1,644.13 km) |
| Unna to Mezdra | 943.94 mi (1,519.12 km) |
| Unna to Momchilgrad | 1,084.76 mi (1,745.75 km) |
