The calculated distance (air line) between Tūbā Zangarīya and Ashkelon is approximately 108 miles respectively 173 kilometers.
By car or train, the actual journey to Ashkelon is certainly longer, as only the direct route (as the crow flies) between Tūbā Zangarīya and Ashkelon has been calculated here.
Air line (approximately)
173 kilometers
93 nautical miles