| Horb am Neckar to Devnya | 974.70 mi (1,568.62 km) |
| Horb am Neckar to Dimitrovgrad | 930.85 mi (1,498.05 km) |
| Horb am Neckar to Dobrich | 975.36 mi (1,569.69 km) |
| Horb am Neckar to Dospat | 886.97 mi (1,427.45 km) |
| Horb am Neckar to Dupnitsa | 818.40 mi (1,317.08 km) |
| Horb am Neckar to Elhovo | 967.78 mi (1,557.48 km) |
| Horb am Neckar to Etropole | 832.95 mi (1,340.50 km) |
| Horb am Neckar to Gabrovo | 888.87 mi (1,430.49 km) |
| Horb am Neckar to Gorna Oryahovitsa | 895.37 mi (1,440.96 km) |
| Horb am Neckar to Gotse Delchev | 872.76 mi (1,404.56 km) |
| Horb am Neckar to Harmanli | 948.12 mi (1,525.86 km) |
| Horb am Neckar to Haskovo | 933.98 mi (1,503.09 km) |
| Horb am Neckar to Ihtiman | 840.46 mi (1,352.58 km) |
| Horb am Neckar to Isperih | 926.09 mi (1,490.39 km) |
| Horb am Neckar to Kardzhali | 936.81 mi (1,507.66 km) |
