The calculated distance (air line) between Aţ Ţafīlah and Ḩayy Khildā is approximately 81 miles respectively 130 kilometers.
By car or train, the actual journey to Ḩayy Khildā is certainly longer, as only the direct route (as the crow flies) between Aţ Ţafīlah and Ḩayy Khildā has been calculated here.
Air line (approximately)
130 kilometers
70 nautical miles