The calculated distance (air line) between Giv'at Shmuel and Nahariyya is approximately 66 miles respectively 106 kilometers.
By car or train, the actual journey to Nahariyya is certainly longer, as only the direct route (as the crow flies) between Giv'at Shmuel and Nahariyya has been calculated here.
Air line (approximately)
106 kilometers
57 nautical miles