The calculated distance (air line) between Adh Dhayd and Al Manāmah is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Al Manāmah is certainly longer, as only the direct route (as the crow flies) between Adh Dhayd and Al Manāmah has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles