| Gustrow to Devnya | 1,010.92 mi (1,626.92 km) |
| Gustrow to Dimitrovgrad | 1,018.53 mi (1,639.17 km) |
| Gustrow to Dobrich | 1,000.54 mi (1,610.22 km) |
| Gustrow to Dospat | 1,004.30 mi (1,616.26 km) |
| Gustrow to Dupnitsa | 941.09 mi (1,514.53 km) |
| Gustrow to Elhovo | 1,039.19 mi (1,672.41 km) |
| Gustrow to Etropole | 929.40 mi (1,495.73 km) |
| Gustrow to Gabrovo | 963.89 mi (1,551.23 km) |
| Gustrow to Gorna Oryahovitsa | 959.21 mi (1,543.70 km) |
| Gustrow to Gotse Delchev | 998.56 mi (1,607.03 km) |
| Gustrow to Harmanli | 1,033.65 mi (1,663.50 km) |
| Gustrow to Haskovo | 1,024.42 mi (1,648.64 km) |
| Gustrow to Ihtiman | 948.14 mi (1,525.88 km) |
| Gustrow to Isperih | 961.00 mi (1,546.58 km) |
| Gustrow to Kardzhali | 1,035.60 mi (1,666.64 km) |
