| Duluth to Devnya | 5,211.40 mi (8,386.94 km) |
| Duluth to Dimitrovgrad | 5,212.58 mi (8,388.84 km) |
| Duluth to Dobrich | 5,200.53 mi (8,369.45 km) |
| Duluth to Dospat | 5,187.49 mi (8,348.46 km) |
| Duluth to Dupnitsa | 5,120.38 mi (8,240.45 km) |
| Duluth to Elhovo | 5,237.14 mi (8,428.37 km) |
| Duluth to Etropole | 5,119.05 mi (8,238.32 km) |
| Duluth to Gabrovo | 5,160.13 mi (8,304.43 km) |
| Duluth to Gorna Oryahovitsa | 5,157.47 mi (8,300.15 km) |
| Duluth to Gotse Delchev | 5,177.67 mi (8,332.66 km) |
| Duluth to Harmanli | 5,228.50 mi (8,414.47 km) |
| Duluth to Haskovo | 5,217.80 mi (8,397.23 km) |
| Duluth to Ihtiman | 5,134.12 mi (8,262.56 km) |
| Duluth to Isperih | 5,161.51 mi (8,306.65 km) |
| Duluth to Kardzhali | 5,226.60 mi (8,411.39 km) |
