The calculated distance (air line) between Néa Kallikráteia and Aigáleo is approximately 164 miles respectively 265 kilometers.
By car or train, the actual journey to Aigáleo is certainly longer, as only the direct route (as the crow flies) between Néa Kallikráteia and Aigáleo has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles