The calculated distance (air line) between Neuhofen an der Krems and Hietzing is approximately 95 miles respectively 154 kilometers.
By car or train, the actual journey to Hietzing is certainly longer, as only the direct route (as the crow flies) between Neuhofen an der Krems and Hietzing has been calculated here.
Air line (approximately)
154 kilometers
83 nautical miles