| Billdal to Devnya | 1,201.76 mi (1,934.05 km) |
| Billdal to Dimitrovgrad | 1,228.89 mi (1,977.71 km) |
| Billdal to Dobrich | 1,187.24 mi (1,910.68 km) |
| Billdal to Dospat | 1,225.23 mi (1,971.82 km) |
| Billdal to Dupnitsa | 1,165.99 mi (1,876.47 km) |
| Billdal to Elhovo | 1,242.74 mi (2,000.00 km) |
| Billdal to Etropole | 1,146.43 mi (1,845.00 km) |
| Billdal to Gabrovo | 1,171.97 mi (1,886.11 km) |
| Billdal to Gorna Oryahovitsa | 1,163.39 mi (1,872.30 km) |
| Billdal to Gotse Delchev | 1,222.37 mi (1,967.22 km) |
| Billdal to Harmanli | 1,242.64 mi (1,999.84 km) |
| Billdal to Haskovo | 1,235.53 mi (1,988.39 km) |
| Billdal to Ihtiman | 1,168.06 mi (1,879.82 km) |
| Billdal to Isperih | 1,153.77 mi (1,856.82 km) |
| Billdal to Kardzhali | 1,249.22 mi (2,010.43 km) |
