The calculated distance (air line) between Ḩayy al Quwaysimah and Wādī as Sīr is approximately 8 miles respectively 13 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 Ḩayy al Quwaysimah and Wādī as Sīr has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles