| Gaithersburg to Devnya | 5,061.99 mi (8,146.49 km) |
| Gaithersburg to Dimitrovgrad | 5,032.96 mi (8,099.77 km) |
| Gaithersburg to Dobrich | 5,057.43 mi (8,139.14 km) |
| Gaithersburg to Dospat | 4,991.07 mi (8,032.36 km) |
| Gaithersburg to Dupnitsa | 4,922.50 mi (7,922.00 km) |
| Gaithersburg to Elhovo | 5,067.10 mi (8,154.71 km) |
| Gaithersburg to Etropole | 4,935.25 mi (7,942.52 km) |
| Gaithersburg to Gabrovo | 4,987.83 mi (8,027.13 km) |
| Gaithersburg to Gorna Oryahovitsa | 4,991.37 mi (8,032.83 km) |
| Gaithersburg to Gotse Delchev | 4,976.63 mi (8,009.11 km) |
| Gaithersburg to Harmanli | 5,050.08 mi (8,127.32 km) |
| Gaithersburg to Haskovo | 5,036.54 mi (8,105.52 km) |
| Gaithersburg to Ihtiman | 4,944.08 mi (7,956.73 km) |
| Gaithersburg to Isperih | 5,011.73 mi (8,065.60 km) |
| Gaithersburg to Kardzhali | 5,040.34 mi (8,111.64 km) |
