| Drogheda to Karlovo | 1,608.49 mi (2,588.62 km) |
| Drogheda to Karnobat | 1,695.12 mi (2,728.03 km) |
| Drogheda to Kavarna | 1,715.48 mi (2,760.80 km) |
| Drogheda to Kazanlak | 1,633.04 mi (2,628.13 km) |
| Drogheda to Knezha | 1,543.03 mi (2,483.27 km) |
| Drogheda to Kostinbrod | 1,538.52 mi (2,476.00 km) |
| Drogheda to Kozloduy | 1,517.22 mi (2,441.73 km) |
| Drogheda to Kyustendil | 1,541.58 mi (2,480.93 km) |
| Drogheda to Levski | 1,590.29 mi (2,559.33 km) |
| Drogheda to Lom | 1,495.84 mi (2,407.32 km) |
| Drogheda to Lovech | 1,583.68 mi (2,548.69 km) |
| Drogheda to Lukovit | 1,559.14 mi (2,509.20 km) |
| Drogheda to Lyaskovets | 1,624.78 mi (2,614.84 km) |
| Drogheda to Mezdra | 1,542.92 mi (2,483.08 km) |
| Drogheda to Momchilgrad | 1,681.78 mi (2,706.57 km) |
