The calculated distance (air line) between Al-'Alūaṣ and Qaşr Bin Ghashīr is approximately 46 miles respectively 73 kilometers.
By car or train, the actual journey to Qaşr Bin Ghashīr is certainly longer, as only the direct route (as the crow flies) between Al-'Alūaṣ and Qaşr Bin Ghashīr has been calculated here.
Air line (approximately)
73 kilometers
40 nautical miles