The calculated distance (air line) between Néa Chalkidóna and Chaniá is approximately 175 miles respectively 281 kilometers.
By car or train, the actual journey to Chaniá is certainly longer, as only the direct route (as the crow flies) between Néa Chalkidóna and Chaniá has been calculated here.
Air line (approximately)
281 kilometers
152 nautical miles