The calculated distance (air line) between Sakhnīn and Kiryat Gat is approximately 92 miles respectively 148 kilometers.
By car or train, the actual journey to Kiryat Gat is certainly longer, as only the direct route (as the crow flies) between Sakhnīn and Kiryat Gat has been calculated here.
Air line (approximately)
148 kilometers
80 nautical miles