The calculated distance (air line) between Néa Chalkidóna and Agios Dimitrios is approximately 6 miles respectively 10 kilometers.
By car or train, the actual journey to Agios Dimitrios is certainly longer, as only the direct route (as the crow flies) between Néa Chalkidóna and Agios Dimitrios has been calculated here.
Air line (approximately)
10 kilometers
6 nautical miles