The calculated distance (air line) between Aţ Ţafīlah and As Salţ is approximately 83 miles respectively 134 kilometers.
By car or train, the actual journey to As Salţ is certainly longer, as only the direct route (as the crow flies) between Aţ Ţafīlah and As Salţ has been calculated here.
Air line (approximately)
134 kilometers
72 nautical miles