| Castalla to Devnya | 1,501.08 mi (2,415.76 km) |
| Castalla to Dimitrovgrad | 1,398.57 mi (2,250.79 km) |
| Castalla to Dobrich | 1,515.69 mi (2,439.27 km) |
| Castalla to Dospat | 1,324.35 mi (2,131.33 km) |
| Castalla to Dupnitsa | 1,272.16 mi (2,047.34 km) |
| Castalla to Elhovo | 1,448.24 mi (2,330.71 km) |
| Castalla to Etropole | 1,319.65 mi (2,123.77 km) |
| Castalla to Gabrovo | 1,387.19 mi (2,232.46 km) |
| Castalla to Gorna Oryahovitsa | 1,406.85 mi (2,264.11 km) |
| Castalla to Gotse Delchev | 1,301.87 mi (2,095.15 km) |
| Castalla to Harmanli | 1,413.87 mi (2,275.41 km) |
| Castalla to Haskovo | 1,396.74 mi (2,247.84 km) |
| Castalla to Ihtiman | 1,308.45 mi (2,105.75 km) |
| Castalla to Isperih | 1,466.51 mi (2,360.12 km) |
| Castalla to Kardzhali | 1,386.30 mi (2,231.03 km) |
