The calculated distance (air line) between Mubārak al Kabīr and Al Khafjī is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Al Khafjī is certainly longer, as only the direct route (as the crow flies) between Mubārak al Kabīr and Al Khafjī has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles