The calculated distance (air line) between Mubārak al Kabīr and Umm Qaşr is approximately 59 miles respectively 96 kilometers.
By car or train, the actual journey to Umm Qaşr is certainly longer, as only the direct route (as the crow flies) between Mubārak al Kabīr and Umm Qaşr has been calculated here.
Air line (approximately)
96 kilometers
52 nautical miles