The calculated distance (air line) between Deutsch-Wagram and Hainburg an der Donau is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to Hainburg an der Donau is certainly longer, as only the direct route (as the crow flies) between Deutsch-Wagram and Hainburg an der Donau has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles