The calculated distance (air line) between Ar Rām wa Ḑāḩiyat al Barīd and Khān Yūnis is approximately 65 miles respectively 105 kilometers.
By car or train, the actual journey to Khān Yūnis is certainly longer, as only the direct route (as the crow flies) between Ar Rām wa Ḑāḩiyat al Barīd and Khān Yūnis has been calculated here.
Air line (approximately)
105 kilometers
56 nautical miles