| Flensburg to Devnya | 1,139.87 mi (1,834.45 km) |
| Flensburg to Dimitrovgrad | 1,144.69 mi (1,842.21 km) |
| Flensburg to Dobrich | 1,129.83 mi (1,818.28 km) |
| Flensburg to Dospat | 1,127.88 mi (1,815.15 km) |
| Flensburg to Dupnitsa | 1,063.64 mi (1,711.76 km) |
| Flensburg to Elhovo | 1,166.54 mi (1,877.36 km) |
| Flensburg to Etropole | 1,054.30 mi (1,696.73 km) |
| Flensburg to Gabrovo | 1,090.63 mi (1,755.19 km) |
| Flensburg to Gorna Oryahovitsa | 1,086.63 mi (1,748.76 km) |
| Flensburg to Gotse Delchev | 1,121.27 mi (1,804.50 km) |
| Flensburg to Harmanli | 1,160.05 mi (1,866.91 km) |
| Flensburg to Haskovo | 1,150.41 mi (1,851.41 km) |
| Flensburg to Ihtiman | 1,072.20 mi (1,725.53 km) |
| Flensburg to Isperih | 1,089.85 mi (1,753.94 km) |
| Flensburg to Kardzhali | 1,161.01 mi (1,868.47 km) |
