The calculated distance (air line) between Az̧ Z̧āhirīyah and Khān Yūnis is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Khān Yūnis is certainly longer, as only the direct route (as the crow flies) between Az̧ Z̧āhirīyah and Khān Yūnis has been calculated here.
Air line (approximately)
64 kilometers
34 nautical miles