The calculated distance (air line) between Zarqa and Wādī as Sīr is approximately 18 miles respectively 29 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 Zarqa and Wādī as Sīr has been calculated here.
Air line (approximately)
29 kilometers
15 nautical miles