The calculated distance (air line) between Drosiá and Néa Smýrni is approximately 15 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 Drosiá and Néa Smýrni has been calculated here.
Air line (approximately)
23 kilometers
13 nautical miles