The calculated distance (air line) between Áyios Konstandínos and Néa Smýrni is approximately 134 miles respectively 216 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Áyios Konstandínos and Néa Smýrni has been calculated here.
Air line (approximately)
216 kilometers
117 nautical miles