The calculated distance (air line) between Néa Michanióna and Glyfáda is approximately 186 miles respectively 299 kilometers.
By car or train, the actual journey to Glyfáda is certainly longer, as only the direct route (as the crow flies) between Néa Michanióna and Glyfáda has been calculated here.
Air line (approximately)
299 kilometers
162 nautical miles