The calculated distance (air line) between Pátra and Néa Smýrni is approximately 110 miles respectively 176 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Pátra and Néa Smýrni has been calculated here.
Air line (approximately)
176 kilometers
95 nautical miles