| Willebroek to Dimitrovgrad | 1,179.19 mi (1,897.72 km) |
| Willebroek to Dobrich | 1,208.23 mi (1,944.46 km) |
| Willebroek to Dospat | 1,140.81 mi (1,835.96 km) |
| Willebroek to Dupnitsa | 1,072.30 mi (1,725.70 km) |
| Willebroek to Elhovo | 1,212.88 mi (1,951.94 km) |
| Willebroek to Etropole | 1,081.70 mi (1,740.83 km) |
| Willebroek to Gabrovo | 1,133.60 mi (1,824.36 km) |
| Willebroek to Gorna Oryahovitsa | 1,137.44 mi (1,830.53 km) |
| Willebroek to Gotse Delchev | 1,127.96 mi (1,815.28 km) |
| Willebroek to Harmanli | 1,196.22 mi (1,925.13 km) |
| Willebroek to Haskovo | 1,182.97 mi (1,903.81 km) |
| Willebroek to Ihtiman | 1,091.74 mi (1,756.98 km) |
| Willebroek to Isperih | 1,160.89 mi (1,868.27 km) |
| Willebroek to Kardzhali | 1,187.63 mi (1,911.30 km) |
| Willebroek to Karlovo | 1,121.94 mi (1,805.60 km) |
