The calculated distance (air line) between Hainburg an der Donau and Ottakring is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Ottakring is certainly longer, as only the direct route (as the crow flies) between Hainburg an der Donau and Ottakring has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles