The calculated distance (air line) between Dayr al Ghuşūn and Khān Yūnis is approximately 83 miles respectively 134 kilometers.
By car or train, the actual journey to Khān Yūnis is certainly longer, as only the direct route (as the crow flies) between Dayr al Ghuşūn and Khān Yūnis has been calculated here.
Air line (approximately)
134 kilometers
72 nautical miles