| Castrop-Rauxel to Devnya | 1,103.05 mi (1,775.18 km) |
| Castrop-Rauxel to Dimitrovgrad | 1,080.61 mi (1,739.07 km) |
| Castrop-Rauxel to Dobrich | 1,098.75 mi (1,768.27 km) |
| Castrop-Rauxel to Dospat | 1,048.04 mi (1,686.65 km) |
| Castrop-Rauxel to Dupnitsa | 980.12 mi (1,577.35 km) |
| Castrop-Rauxel to Elhovo | 1,111.38 mi (1,788.60 km) |
| Castrop-Rauxel to Etropole | 984.20 mi (1,583.92 km) |
| Castrop-Rauxel to Gabrovo | 1,032.34 mi (1,661.40 km) |
| Castrop-Rauxel to Gorna Oryahovitsa | 1,034.16 mi (1,664.33 km) |
| Castrop-Rauxel to Gotse Delchev | 1,036.93 mi (1,668.77 km) |
| Castrop-Rauxel to Harmanli | 1,097.33 mi (1,765.98 km) |
| Castrop-Rauxel to Haskovo | 1,084.96 mi (1,746.07 km) |
| Castrop-Rauxel to Ihtiman | 996.57 mi (1,603.82 km) |
| Castrop-Rauxel to Isperih | 1,052.79 mi (1,694.30 km) |
| Castrop-Rauxel to Kardzhali | 1,091.32 mi (1,756.30 km) |
