The calculated distance (air line) between Kharjā and Ḩayy al Quwaysimah is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Ḩayy al Quwaysimah is certainly longer, as only the direct route (as the crow flies) between Kharjā and Ḩayy al Quwaysimah has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles