The calculated distance (air line) between Dūrā and Khān Yūnis is approximately 44 miles respectively 71 kilometers.
By car or train, the actual journey to Khān Yūnis is certainly longer, as only the direct route (as the crow flies) between Dūrā and Khān Yūnis has been calculated here.
Air line (approximately)
71 kilometers
38 nautical miles