| Castleton to Devnya | 1,525.40 mi (2,454.89 km) |
| Castleton to Dimitrovgrad | 1,500.67 mi (2,415.10 km) |
| Castleton to Dobrich | 1,521.04 mi (2,447.88 km) |
| Castleton to Dospat | 1,464.88 mi (2,357.50 km) |
| Castleton to Dupnitsa | 1,396.52 mi (2,247.48 km) |
| Castleton to Elhovo | 1,532.60 mi (2,466.49 km) |
| Castleton to Etropole | 1,403.68 mi (2,259.00 km) |
| Castleton to Gabrovo | 1,453.44 mi (2,339.08 km) |
| Castleton to Gorna Oryahovitsa | 1,455.86 mi (2,342.98 km) |
| Castleton to Gotse Delchev | 1,452.60 mi (2,337.73 km) |
| Castleton to Harmanli | 1,517.54 mi (2,442.25 km) |
| Castleton to Haskovo | 1,504.77 mi (2,421.69 km) |
| Castleton to Ihtiman | 1,414.82 mi (2,276.93 km) |
| Castleton to Isperih | 1,475.14 mi (2,374.01 km) |
| Castleton to Kardzhali | 1,510.28 mi (2,430.56 km) |
