The calculated distance (air line) between Diónysos and Néa Smýrni is approximately 14 miles respectively 23 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Diónysos and Néa Smýrni has been calculated here.
Air line (approximately)
23 kilometers
12 nautical miles