The calculated distance (air line) between Plagiári and Néa Smýrni is approximately 179 miles respectively 289 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Plagiári and Néa Smýrni has been calculated here.
Air line (approximately)
289 kilometers
156 nautical miles