The calculated distance (air line) between Finkenstein am Faaker See and Donaustadt is approximately 167 miles respectively 269 kilometers.
By car or train, the actual journey to Donaustadt is certainly longer, as only the direct route (as the crow flies) between Finkenstein am Faaker See and Donaustadt has been calculated here.
Air line (approximately)
269 kilometers
145 nautical miles