The calculated distance (air line) between Halle (Saale) and Hettstedt is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Hettstedt is certainly longer, as only the direct route (as the crow flies) between Halle (Saale) and Hettstedt has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles