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