The calculated distance (air line) between Aţ Ţafīlah and Wādī as Sīr is approximately 78 miles respectively 126 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 Aţ Ţafīlah and Wādī as Sīr has been calculated here.
Air line (approximately)
126 kilometers
68 nautical miles