The calculated distance (air line) between Şammā and Umm as Summāq is approximately 48 miles respectively 78 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 Şammā and Umm as Summāq has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles