The calculated distance (air line) between Néa Moudhaniá and Néa Ionía is approximately 155 miles respectively 249 kilometers.
By car or train, the actual journey to Néa Ionía is certainly longer, as only the direct route (as the crow flies) between Néa Moudhaniá and Néa Ionía has been calculated here.
Air line (approximately)
249 kilometers
134 nautical miles