The calculated distance (air line) between Kuwait City and Mubārak al Kabīr is approximately 14 miles respectively 23 kilometers.
By car or train, the actual journey to Mubārak al Kabīr is certainly longer, as only the direct route (as the crow flies) between Kuwait City and Mubārak al Kabīr has been calculated here.
Air line (approximately)
23 kilometers
12 nautical miles