The calculated distance (air line) between Tarqūmyā and Khān Yūnis is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Khān Yūnis is certainly longer, as only the direct route (as the crow flies) between Tarqūmyā and Khān Yūnis has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles