The calculated distance (air line) between Deir el Asad and Kiryat Gat is approximately 96 miles respectively 155 kilometers.
By car or train, the actual journey to Kiryat Gat is certainly longer, as only the direct route (as the crow flies) between Deir el Asad and Kiryat Gat has been calculated here.
Air line (approximately)
155 kilometers
84 nautical miles