| Castleford to Devnya | 1,495.76 mi (2,407.19 km) |
| Castleford to Dimitrovgrad | 1,472.68 mi (2,370.05 km) |
| Castleford to Dobrich | 1,491.08 mi (2,399.66 km) |
| Castleford to Dospat | 1,437.92 mi (2,314.11 km) |
| Castleford to Dupnitsa | 1,369.65 mi (2,204.24 km) |
| Castleford to Elhovo | 1,504.08 mi (2,420.59 km) |
| Castleford to Etropole | 1,375.89 mi (2,214.28 km) |
| Castleford to Gabrovo | 1,424.98 mi (2,293.28 km) |
| Castleford to Gorna Oryahovitsa | 1,427.04 mi (2,296.60 km) |
| Castleford to Gotse Delchev | 1,425.94 mi (2,294.83 km) |
| Castleford to Harmanli | 1,489.49 mi (2,397.10 km) |
| Castleford to Haskovo | 1,476.87 mi (2,376.80 km) |
| Castleford to Ihtiman | 1,387.43 mi (2,232.86 km) |
| Castleford to Isperih | 1,445.45 mi (2,326.23 km) |
| Castleford to Kardzhali | 1,482.69 mi (2,386.16 km) |
