| Derry to Karlovo | 1,671.67 mi (2,690.29 km) |
| Derry to Karnobat | 1,755.06 mi (2,824.50 km) |
| Derry to Kavarna | 1,771.46 mi (2,850.89 km) |
| Derry to Kazanlak | 1,695.39 mi (2,728.46 km) |
| Derry to Knezha | 1,605.18 mi (2,583.28 km) |
| Derry to Kostinbrod | 1,603.72 mi (2,580.93 km) |
| Derry to Kozloduy | 1,579.16 mi (2,541.41 km) |
| Derry to Kyustendil | 1,608.88 mi (2,589.23 km) |
| Derry to Levski | 1,651.18 mi (2,657.31 km) |
| Derry to Lom | 1,558.43 mi (2,508.06 km) |
| Derry to Lovech | 1,645.79 mi (2,648.64 km) |
| Derry to Lukovit | 1,621.92 mi (2,610.23 km) |
| Derry to Lyaskovets | 1,685.46 mi (2,712.49 km) |
| Derry to Mezdra | 1,606.54 mi (2,585.48 km) |
| Derry to Momchilgrad | 1,746.61 mi (2,810.90 km) |
