The calculated distance (air line) between Salzburg and Schönau am Königssee is approximately 14 miles respectively 23 kilometers.
By car or train, the actual journey to Schönau am Königssee is certainly longer, as only the direct route (as the crow flies) between Salzburg and Schönau am Königssee has been calculated here.
Air line (approximately)
23 kilometers
12 nautical miles