| Koblenz to Karlovo | 973.18 mi (1,566.18 km) |
| Koblenz to Karnobat | 1,060.80 mi (1,707.19 km) |
| Koblenz to Kavarna | 1,084.74 mi (1,745.73 km) |
| Koblenz to Kazanlak | 997.81 mi (1,605.83 km) |
| Koblenz to Knezha | 907.88 mi (1,461.08 km) |
| Koblenz to Kostinbrod | 903.54 mi (1,454.11 km) |
| Koblenz to Kozloduy | 882.13 mi (1,419.64 km) |
| Koblenz to Kyustendil | 907.91 mi (1,461.13 km) |
| Koblenz to Levski | 955.56 mi (1,537.83 km) |
| Koblenz to Lom | 860.60 mi (1,384.99 km) |
| Koblenz to Lovech | 948.52 mi (1,526.50 km) |
| Koblenz to Lukovit | 923.86 mi (1,486.81 km) |
| Koblenz to Lyaskovets | 990.13 mi (1,593.45 km) |
| Koblenz to Mezdra | 907.60 mi (1,460.65 km) |
| Koblenz to Momchilgrad | 1,046.71 mi (1,684.52 km) |
