The calculated distance (air line) between Néa Kallikráteia and Ilioúpoli is approximately 169 miles respectively 272 kilometers.
By car or train, the actual journey to Ilioúpoli is certainly longer, as only the direct route (as the crow flies) between Néa Kallikráteia and Ilioúpoli has been calculated here.
Air line (approximately)
272 kilometers
147 nautical miles