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