The calculated distance (air line) between Davos and Zürich (Kreis 9) is approximately 75 miles respectively 121 kilometers.
By car or train, the actual journey to Zürich (Kreis 9) is certainly longer, as only the direct route (as the crow flies) between Davos and Zürich (Kreis 9) has been calculated here.
Air line (approximately)
121 kilometers
65 nautical miles