The calculated distance (air line) between Migdal Ha‘Emeq and Ashkelon is approximately 80 miles respectively 128 kilometers.
By car or train, the actual journey to Ashkelon is certainly longer, as only the direct route (as the crow flies) between Migdal Ha‘Emeq and Ashkelon has been calculated here.
Air line (approximately)
128 kilometers
69 nautical miles