The calculated distance (air line) between Kafr Asad and Wādī as Sīr is approximately 45 miles respectively 72 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 Asad and Wādī as Sīr has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles