The calculated distance (air line) between Aţ Ţafīlah and Ma'an is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Ma'an is certainly longer, as only the direct route (as the crow flies) between Aţ Ţafīlah and Ma'an has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles