The calculated distance (air line) between Kafr Sawm and Wādī as Sīr is approximately 51 miles respectively 81 kilometers.
By car or train, the actual journey to Wādī as Sīr is certainly longer, as only the direct route (as the crow flies) between Kafr Sawm and Wādī as Sīr has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles