The calculated distance (air line) between Balīlā and Wādī as Sīr is approximately 31 miles respectively 50 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 Balīlā and Wādī as Sīr has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles