| Merrillville to Karlovo | 5,254.66 mi (8,456.56 km) |
| Merrillville to Karnobat | 5,333.45 mi (8,583.36 km) |
| Merrillville to Kavarna | 5,341.25 mi (8,595.92 km) |
| Merrillville to Kazanlak | 5,277.45 mi (8,493.24 km) |
| Merrillville to Knezha | 5,187.25 mi (8,348.08 km) |
| Merrillville to Kostinbrod | 5,188.20 mi (8,349.59 km) |
| Merrillville to Kozloduy | 5,161.08 mi (8,305.96 km) |
| Merrillville to Kyustendil | 5,193.75 mi (8,358.53 km) |
| Merrillville to Levski | 5,231.50 mi (8,419.29 km) |
| Merrillville to Lom | 5,141.11 mi (8,273.81 km) |
| Merrillville to Lovech | 5,227.71 mi (8,413.19 km) |
| Merrillville to Lukovit | 5,204.63 mi (8,376.05 km) |
| Merrillville to Lyaskovets | 5,265.35 mi (8,473.77 km) |
| Merrillville to Mezdra | 5,190.04 mi (8,352.56 km) |
| Merrillville to Momchilgrad | 5,330.78 mi (8,579.06 km) |
