The calculated distance (air line) between Deir Ḥannā and Nahariyya is approximately 18 miles respectively 30 kilometers.
By car or train, the actual journey to Nahariyya is certainly longer, as only the direct route (as the crow flies) between Deir Ḥannā and Nahariyya has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles