The calculated distance (air line) between Sāl and Wādī as Sīr is approximately 43 miles respectively 69 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 Sāl and Wādī as Sīr has been calculated here.
Air line (approximately)
69 kilometers
37 nautical miles