The calculated distance (air line) between Zikhron Ya‘aqov and Ashdod is approximately 56 miles respectively 91 kilometers.
By car or train, the actual journey to Ashdod is certainly longer, as only the direct route (as the crow flies) between Zikhron Ya‘aqov and Ashdod has been calculated here.
Air line (approximately)
91 kilometers
49 nautical miles