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