The calculated distance (air line) between Donaustadt and Saalfelden am Steinernen Meer is approximately 177 miles respectively 284 kilometers.
By car or train, the actual journey to Saalfelden am Steinernen Meer is certainly longer, as only the direct route (as the crow flies) between Donaustadt and Saalfelden am Steinernen Meer has been calculated here.
Air line (approximately)
284 kilometers
153 nautical miles