The calculated distance (air line) between Aţ Ţafīlah and Umm as Summāq is approximately 74 miles respectively 119 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 Aţ Ţafīlah and Umm as Summāq has been calculated here.
Air line (approximately)
119 kilometers
64 nautical miles