The calculated distance (air line) between Sāl and Umm as Summāq is approximately 47 miles respectively 76 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 Sāl and Umm as Summāq has been calculated here.
Air line (approximately)
76 kilometers
41 nautical miles