| Idstein to Devnya | 1,029.85 mi (1,657.38 km) |
| Idstein to Dimitrovgrad | 999.57 mi (1,608.65 km) |
| Idstein to Dobrich | 1,027.39 mi (1,653.42 km) |
| Idstein to Dospat | 962.99 mi (1,549.79 km) |
| Idstein to Dupnitsa | 894.64 mi (1,439.78 km) |
| Idstein to Elhovo | 1,032.63 mi (1,661.86 km) |
| Idstein to Etropole | 902.31 mi (1,452.12 km) |
| Idstein to Gabrovo | 953.37 mi (1,534.30 km) |
| Idstein to Gorna Oryahovitsa | 956.87 mi (1,539.94 km) |
| Idstein to Gotse Delchev | 950.80 mi (1,530.17 km) |
| Idstein to Harmanli | 1,016.54 mi (1,635.96 km) |
| Idstein to Haskovo | 1,003.51 mi (1,614.99 km) |
| Idstein to Ihtiman | 913.04 mi (1,469.40 km) |
| Idstein to Isperih | 980.00 mi (1,577.16 km) |
| Idstein to Kardzhali | 1,008.65 mi (1,623.27 km) |
