The calculated distance (air line) between Agriá and Néa Smýrni is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Agriá and Néa Smýrni has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles