The calculated distance (air line) between Migdal Ha‘Emeq and Jaffa is approximately 52 miles respectively 83 kilometers.
By car or train, the actual journey to Jaffa is certainly longer, as only the direct route (as the crow flies) between Migdal Ha‘Emeq and Jaffa has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles