The calculated distance (air line) between Qaşr Bin Ghashīr and Tarhuna is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Tarhuna is certainly longer, as only the direct route (as the crow flies) between Qaşr Bin Ghashīr and Tarhuna has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles