The calculated distance (air line) between Halle (Saale) and Roßleben is approximately 27 miles respectively 43 kilometers.
By car or train, the actual journey to Roßleben is certainly longer, as only the direct route (as the crow flies) between Halle (Saale) and Roßleben has been calculated here.
Air line (approximately)
43 kilometers
23 nautical miles