The calculated distance (air line) between Ḩukūmatī Azrah and Khōst is approximately 60 miles respectively 96 kilometers.
By car or train, the actual journey to Khōst is certainly longer, as only the direct route (as the crow flies) between Ḩukūmatī Azrah and Khōst has been calculated here.
Air line (approximately)
96 kilometers
52 nautical miles