The calculated distance (air line) between Néon Karlovásion and Ilioúpoli is approximately 161 miles respectively 258 kilometers.
By car or train, the actual journey to Ilioúpoli is certainly longer, as only the direct route (as the crow flies) between Néon Karlovásion and Ilioúpoli has been calculated here.
Air line (approximately)
258 kilometers
139 nautical miles