The calculated distance (air line) between Qiryat Ye‘arim and Ashkelon is approximately 33 miles respectively 53 kilometers.
By car or train, the actual journey to Ashkelon is certainly longer, as only the direct route (as the crow flies) between Qiryat Ye‘arim and Ashkelon has been calculated here.
Air line (approximately)
53 kilometers
29 nautical miles