The calculated distance (air line) between Bir Hadaj and Kiryat Gat is approximately 41 miles respectively 65 kilometers.
By car or train, the actual journey to Kiryat Gat is certainly longer, as only the direct route (as the crow flies) between Bir Hadaj and Kiryat Gat has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles