| Castricum to Devnya | 1,233.66 mi (1,985.38 km) |
| Castricum to Dimitrovgrad | 1,212.61 mi (1,951.50 km) |
| Castricum to Dobrich | 1,228.86 mi (1,977.65 km) |
| Castricum to Dospat | 1,180.09 mi (1,899.17 km) |
| Castricum to Dupnitsa | 1,112.14 mi (1,789.81 km) |
| Castricum to Elhovo | 1,243.12 mi (2,000.61 km) |
| Castricum to Etropole | 1,116.26 mi (1,796.45 km) |
| Castricum to Gabrovo | 1,164.14 mi (1,873.50 km) |
| Castricum to Gorna Oryahovitsa | 1,165.70 mi (1,876.02 km) |
| Castricum to Gotse Delchev | 1,168.89 mi (1,881.15 km) |
| Castricum to Harmanli | 1,229.30 mi (1,978.37 km) |
| Castricum to Haskovo | 1,216.98 mi (1,958.55 km) |
| Castricum to Ihtiman | 1,128.66 mi (1,816.40 km) |
| Castricum to Isperih | 1,183.33 mi (1,904.38 km) |
| Castricum to Kardzhali | 1,223.40 mi (1,968.87 km) |
