The calculated distance (air line) between Umm as Summāq and Mādabā is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Mādabā is certainly longer, as only the direct route (as the crow flies) between Umm as Summāq and Mādabā has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles