The calculated distance (air line) between Amman and Umm as Summāq is approximately 7 miles respectively 12 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 Amman and Umm as Summāq has been calculated here.
Air line (approximately)
12 kilometers
6 nautical miles