The calculated distance (air line) between Néa Moudhaniá and Néa Smýrni is approximately 161 miles respectively 258 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 Moudhaniá and Néa Smýrni has been calculated here.
Air line (approximately)
258 kilometers
139 nautical miles