| Effingham to Karlovo | 5,416.55 mi (8,717.09 km) |
| Effingham to Karnobat | 5,496.62 mi (8,845.96 km) |
| Effingham to Kavarna | 5,505.81 mi (8,860.75 km) |
| Effingham to Kazanlak | 5,439.67 mi (8,754.31 km) |
| Effingham to Knezha | 5,349.44 mi (8,609.10 km) |
| Effingham to Kostinbrod | 5,349.26 mi (8,608.81 km) |
| Effingham to Kozloduy | 5,323.31 mi (8,567.04 km) |
| Effingham to Kyustendil | 5,353.99 mi (8,616.42 km) |
| Effingham to Levski | 5,394.19 mi (8,681.11 km) |
| Effingham to Lom | 5,303.08 mi (8,534.49 km) |
| Effingham to Lovech | 5,389.96 mi (8,674.30 km) |
| Effingham to Lukovit | 5,366.61 mi (8,636.73 km) |
| Effingham to Lyaskovets | 5,428.17 mi (8,735.79 km) |
| Effingham to Mezdra | 5,351.70 mi (8,612.72 km) |
| Effingham to Momchilgrad | 5,492.09 mi (8,838.66 km) |
