The calculated distance (air line) between Bad Neustadt an der Saale and Bielefeld is approximately 139 miles respectively 223 kilometers.
By car or train, the actual journey to Bielefeld is certainly longer, as only the direct route (as the crow flies) between Bad Neustadt an der Saale and Bielefeld has been calculated here.
Air line (approximately)
223 kilometers
120 nautical miles