The calculated distance (air line) between Bad Sooden-Allendorf and Wandsbek is approximately 160 miles respectively 257 kilometers.
By car or train, the actual journey to Wandsbek is certainly longer, as only the direct route (as the crow flies) between Bad Sooden-Allendorf and Wandsbek has been calculated here.
Air line (approximately)
257 kilometers
139 nautical miles