| Bilthoven to Devnya | 1,201.88 mi (1,934.24 km) |
| Bilthoven to Dimitrovgrad | 1,179.04 mi (1,897.48 km) |
| Bilthoven to Dobrich | 1,197.51 mi (1,927.20 km) |
| Bilthoven to Dospat | 1,145.66 mi (1,843.76 km) |
| Bilthoven to Dupnitsa | 1,077.60 mi (1,734.24 km) |
| Bilthoven to Elhovo | 1,210.07 mi (1,947.42 km) |
| Bilthoven to Etropole | 1,082.47 mi (1,742.07 km) |
| Bilthoven to Gabrovo | 1,131.00 mi (1,820.17 km) |
| Bilthoven to Gorna Oryahovitsa | 1,132.94 mi (1,823.30 km) |
| Bilthoven to Gotse Delchev | 1,134.24 mi (1,825.38 km) |
| Bilthoven to Harmanli | 1,195.79 mi (1,924.44 km) |
| Bilthoven to Haskovo | 1,183.33 mi (1,904.38 km) |
| Bilthoven to Ihtiman | 1,094.53 mi (1,761.48 km) |
| Bilthoven to Isperih | 1,151.61 mi (1,853.34 km) |
| Bilthoven to Kardzhali | 1,189.48 mi (1,914.29 km) |
