The calculated distance (air line) between Néa Kallikráteia and Néa Smýrni is approximately 167 miles respectively 269 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Néa Kallikráteia and Néa Smýrni has been calculated here.
Air line (approximately)
269 kilometers
145 nautical miles