| Helmstedt to Devnya | 985.87 mi (1,586.61 km) |
| Helmstedt to Dimitrovgrad | 978.67 mi (1,575.01 km) |
| Helmstedt to Dobrich | 978.59 mi (1,574.88 km) |
| Helmstedt to Dospat | 955.83 mi (1,538.26 km) |
| Helmstedt to Dupnitsa | 889.98 mi (1,432.29 km) |
| Helmstedt to Elhovo | 1,004.34 mi (1,616.32 km) |
| Helmstedt to Etropole | 885.40 mi (1,424.91 km) |
| Helmstedt to Gabrovo | 926.67 mi (1,491.33 km) |
| Helmstedt to Gorna Oryahovitsa | 925.13 mi (1,488.85 km) |
| Helmstedt to Gotse Delchev | 947.64 mi (1,525.07 km) |
| Helmstedt to Harmanli | 994.65 mi (1,600.73 km) |
| Helmstedt to Haskovo | 983.87 mi (1,583.38 km) |
| Helmstedt to Ihtiman | 901.35 mi (1,450.58 km) |
| Helmstedt to Isperih | 935.43 mi (1,505.43 km) |
| Helmstedt to Kardzhali | 992.86 mi (1,597.86 km) |
