The calculated distance (air line) between Kryonéri and Agios Dimitrios is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Agios Dimitrios is certainly longer, as only the direct route (as the crow flies) between Kryonéri and Agios Dimitrios has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles