The calculated distance (air line) between Bad Neustadt an der Saale and Wiesbaden is approximately 88 miles respectively 142 kilometers.
By car or train, the actual journey to Wiesbaden is certainly longer, as only the direct route (as the crow flies) between Bad Neustadt an der Saale and Wiesbaden has been calculated here.
Air line (approximately)
142 kilometers
77 nautical miles