The calculated distance (air line) between Ḩūsān and Khān Yūnis is approximately 55 miles respectively 89 kilometers.
By car or train, the actual journey to Khān Yūnis is certainly longer, as only the direct route (as the crow flies) between Ḩūsān and Khān Yūnis has been calculated here.
Air line (approximately)
89 kilometers
48 nautical miles