The calculated distance (air line) between Buchholz in der Nordheide and Bispingen is approximately 18 miles respectively 28 kilometers.
By car or train, the actual journey to Bispingen is certainly longer, as only the direct route (as the crow flies) between Buchholz in der Nordheide and Bispingen has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles