| Willebroek to Nova Zagora | 1,176.85 mi (1,893.96 km) |
| Willebroek to Novi Iskar | 1,057.50 mi (1,701.88 km) |
| Willebroek to Novi Pazar | 1,190.32 mi (1,915.64 km) |
| Willebroek to Omurtag | 1,168.05 mi (1,879.79 km) |
| Willebroek to Panagyurishte | 1,103.41 mi (1,775.76 km) |
| Willebroek to Parvomay | 1,161.78 mi (1,869.70 km) |
| Willebroek to Pavlikeni | 1,117.59 mi (1,798.59 km) |
| Willebroek to Pazardzhik | 1,122.52 mi (1,806.52 km) |
| Willebroek to Pernik | 1,053.95 mi (1,696.17 km) |
| Willebroek to Peshtera | 1,128.64 mi (1,816.37 km) |
| Willebroek to Petrich | 1,115.95 mi (1,795.94 km) |
| Willebroek to Pleven | 1,082.43 mi (1,742.00 km) |
| Willebroek to Plovdiv | 1,141.13 mi (1,836.47 km) |
| Willebroek to Pomorie | 1,238.81 mi (1,993.68 km) |
| Willebroek to Popovo | 1,150.49 mi (1,851.53 km) |
