| Radolfzell am Bodensee to Devnya | 950.85 mi (1,530.25 km) |
| Radolfzell am Bodensee to Dimitrovgrad | 901.44 mi (1,450.73 km) |
| Radolfzell am Bodensee to Dobrich | 952.82 mi (1,533.42 km) |
| Radolfzell am Bodensee to Dospat | 854.63 mi (1,375.40 km) |
| Radolfzell am Bodensee to Dupnitsa | 786.22 mi (1,265.29 km) |
| Radolfzell am Bodensee to Elhovo | 939.87 mi (1,512.58 km) |
| Radolfzell am Bodensee to Etropole | 803.66 mi (1,293.36 km) |
| Radolfzell am Bodensee to Gabrovo | 861.41 mi (1,386.30 km) |
| Radolfzell am Bodensee to Gorna Oryahovitsa | 869.16 mi (1,398.77 km) |
| Radolfzell am Bodensee to Gotse Delchev | 839.60 mi (1,351.21 km) |
| Radolfzell am Bodensee to Harmanli | 918.79 mi (1,478.65 km) |
| Radolfzell am Bodensee to Haskovo | 904.22 mi (1,455.21 km) |
| Radolfzell am Bodensee to Ihtiman | 809.75 mi (1,303.17 km) |
| Radolfzell am Bodensee to Isperih | 902.95 mi (1,453.17 km) |
| Radolfzell am Bodensee to Kardzhali | 906.07 mi (1,458.18 km) |
