The calculated distance (air line) between Quedlinburg and Bad Lauterberg im Harz is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Bad Lauterberg im Harz is certainly longer, as only the direct route (as the crow flies) between Quedlinburg and Bad Lauterberg im Harz has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles