| Duisburg to Karlovo | 1,039.88 mi (1,673.53 km) |
| Duisburg to Karnobat | 1,124.07 mi (1,809.02 km) |
| Duisburg to Kavarna | 1,143.67 mi (1,840.55 km) |
| Duisburg to Kazanlak | 1,063.63 mi (1,711.75 km) |
| Duisburg to Knezha | 973.44 mi (1,566.60 km) |
| Duisburg to Kostinbrod | 972.43 mi (1,564.98 km) |
| Duisburg to Kozloduy | 947.44 mi (1,524.76 km) |
| Duisburg to Kyustendil | 978.95 mi (1,575.46 km) |
| Duisburg to Levski | 1,019.75 mi (1,641.13 km) |
| Duisburg to Lom | 926.65 mi (1,491.30 km) |
| Duisburg to Lovech | 1,014.06 mi (1,631.97 km) |
| Duisburg to Lukovit | 990.14 mi (1,593.47 km) |
| Duisburg to Lyaskovets | 1,054.13 mi (1,696.45 km) |
| Duisburg to Mezdra | 974.80 mi (1,568.80 km) |
| Duisburg to Momchilgrad | 1,115.11 mi (1,794.59 km) |
