| Gretna to Karlovo | 5,942.02 mi (9,562.76 km) |
| Gretna to Karnobat | 6,028.82 mi (9,702.45 km) |
| Gretna to Kavarna | 6,045.81 mi (9,729.79 km) |
| Gretna to Kazanlak | 5,966.86 mi (9,602.74 km) |
| Gretna to Knezha | 5,876.92 mi (9,458.00 km) |
| Gretna to Kostinbrod | 5,870.66 mi (9,447.91 km) |
| Gretna to Kozloduy | 5,851.14 mi (9,416.50 km) |
| Gretna to Kyustendil | 5,870.98 mi (9,448.42 km) |
| Gretna to Levski | 5,924.20 mi (9,534.08 km) |
| Gretna to Lom | 5,829.64 mi (9,381.90 km) |
| Gretna to Lovech | 5,917.57 mi (9,523.41 km) |
| Gretna to Lukovit | 5,892.86 mi (9,483.64 km) |
| Gretna to Lyaskovets | 5,958.67 mi (9,589.55 km) |
| Gretna to Mezdra | 5,876.27 mi (9,456.94 km) |
| Gretna to Momchilgrad | 6,014.01 mi (9,678.61 km) |
