The calculated distance (air line) between Néa Kallikráteia and Évosmos is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Évosmos is certainly longer, as only the direct route (as the crow flies) between Néa Kallikráteia and Évosmos has been calculated here.
Air line (approximately)
42 kilometers
23 nautical miles