The calculated distance (air line) between Acharnés and Néa Smýrni is approximately 10 miles respectively 15 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Acharnés and Néa Smýrni has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles