The calculated distance (air line) between Saalfelden am Steinernen Meer and Dornbirn is approximately 145 miles respectively 234 kilometers.
By car or train, the actual journey to Dornbirn is certainly longer, as only the direct route (as the crow flies) between Saalfelden am Steinernen Meer and Dornbirn has been calculated here.
Air line (approximately)
234 kilometers
126 nautical miles