The calculated distance (air line) between Aţ Ţafīlah and Amman is approximately 80 miles respectively 128 kilometers.
By car or train, the actual journey to Amman is certainly longer, as only the direct route (as the crow flies) between Aţ Ţafīlah and Amman has been calculated here.
Air line (approximately)
128 kilometers
69 nautical miles