The calculated distance (air line) between Petaẖ Tiqva and Ashdod is approximately 25 miles respectively 40 kilometers.
By car or train, the actual journey to Ashdod is certainly longer, as only the direct route (as the crow flies) between Petaẖ Tiqva and Ashdod has been calculated here.
Air line (approximately)
40 kilometers
21 nautical miles