| Douglas to Devnya | 1,761.17 mi (2,834.32 km) |
| Douglas to Dimitrovgrad | 1,722.76 mi (2,772.51 km) |
| Douglas to Dobrich | 1,759.61 mi (2,831.82 km) |
| Douglas to Dospat | 1,678.75 mi (2,701.69 km) |
| Douglas to Dupnitsa | 1,610.22 mi (2,591.40 km) |
| Douglas to Elhovo | 1,758.89 mi (2,830.66 km) |
| Douglas to Etropole | 1,624.87 mi (2,614.98 km) |
| Douglas to Gabrovo | 1,679.77 mi (2,703.32 km) |
| Douglas to Gorna Oryahovitsa | 1,685.16 mi (2,712.00 km) |
| Douglas to Gotse Delchev | 1,664.08 mi (2,678.08 km) |
| Douglas to Harmanli | 1,740.00 mi (2,800.27 km) |
| Douglas to Haskovo | 1,725.99 mi (2,777.72 km) |
| Douglas to Ihtiman | 1,632.59 mi (2,627.40 km) |
| Douglas to Isperih | 1,711.65 mi (2,754.64 km) |
| Douglas to Kardzhali | 1,728.95 mi (2,782.47 km) |
