The calculated distance (air line) between Kranjska Gora and Ajdovščina is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Ajdovščina is certainly longer, as only the direct route (as the crow flies) between Kranjska Gora and Ajdovščina has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles