The calculated distance (air line) between Bīr el Maksūr and Jaffa is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Jaffa is certainly longer, as only the direct route (as the crow flies) between Bīr el Maksūr and Jaffa has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles