| Gretna to Devnya | 6,025.90 mi (9,697.76 km) |
| Gretna to Dimitrovgrad | 5,999.20 mi (9,654.78 km) |
| Gretna to Dobrich | 6,020.70 mi (9,689.38 km) |
| Gretna to Dospat | 5,958.15 mi (9,588.71 km) |
| Gretna to Dupnitsa | 5,889.56 mi (9,478.33 km) |
| Gretna to Elhovo | 6,032.76 mi (9,708.79 km) |
| Gretna to Etropole | 5,901.59 mi (9,497.70 km) |
| Gretna to Gabrovo | 5,953.50 mi (9,581.23 km) |
| Gretna to Gorna Oryahovitsa | 5,956.58 mi (9,586.18 km) |
| Gretna to Gotse Delchev | 5,943.88 mi (9,565.75 km) |
| Gretna to Harmanli | 6,016.27 mi (9,682.25 km) |
| Gretna to Haskovo | 6,002.88 mi (9,660.70 km) |
| Gretna to Ihtiman | 5,910.78 mi (9,512.49 km) |
| Gretna to Isperih | 5,975.55 mi (9,616.72 km) |
| Gretna to Kardzhali | 6,006.98 mi (9,667.29 km) |
