The calculated distance (air line) between Dibba Al-Hisn and Al Manāmah is approximately 25 miles respectively 41 kilometers.
By car or train, the actual journey to Al Manāmah is certainly longer, as only the direct route (as the crow flies) between Dibba Al-Hisn and Al Manāmah has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles