| Dumbarton to Devnya | 1,664.53 mi (2,678.80 km) |
| Dumbarton to Dimitrovgrad | 1,649.83 mi (2,655.15 km) |
| Dumbarton to Dobrich | 1,657.92 mi (2,668.16 km) |
| Dumbarton to Dospat | 1,619.33 mi (2,606.06 km) |
| Dumbarton to Dupnitsa | 1,551.57 mi (2,497.01 km) |
| Dumbarton to Elhovo | 1,678.72 mi (2,701.64 km) |
| Dumbarton to Etropole | 1,554.15 mi (2,501.16 km) |
| Dumbarton to Gabrovo | 1,600.12 mi (2,575.14 km) |
| Dumbarton to Gorna Oryahovitsa | 1,600.43 mi (2,575.65 km) |
| Dumbarton to Gotse Delchev | 1,608.48 mi (2,588.61 km) |
| Dumbarton to Harmanli | 1,666.34 mi (2,681.71 km) |
| Dumbarton to Haskovo | 1,654.45 mi (2,662.58 km) |
| Dumbarton to Ihtiman | 1,567.33 mi (2,522.37 km) |
| Dumbarton to Isperih | 1,614.07 mi (2,597.59 km) |
| Dumbarton to Kardzhali | 1,661.54 mi (2,673.98 km) |
