The calculated distance (air line) between Qiryat Ye‘arim and Jaffa is approximately 27 miles respectively 43 kilometers.
By car or train, the actual journey to Jaffa is certainly longer, as only the direct route (as the crow flies) between Qiryat Ye‘arim and Jaffa has been calculated here.
Air line (approximately)
43 kilometers
23 nautical miles