The calculated distance (air line) between Ermoúpolis and Néa Smýrni is approximately 76 miles respectively 122 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Ermoúpolis and Néa Smýrni has been calculated here.
Air line (approximately)
122 kilometers
66 nautical miles