The calculated distance (air line) between Saalfelden am Steinernen Meer and Salzburg is approximately 27 miles respectively 44 kilometers.
By car or train, the actual journey to Salzburg is certainly longer, as only the direct route (as the crow flies) between Saalfelden am Steinernen Meer and Salzburg has been calculated here.
Air line (approximately)
44 kilometers
24 nautical miles