The calculated distance (air line) between Davos and Zürich (Kreis 2) is approximately 72 miles respectively 116 kilometers.
By car or train, the actual journey to Zürich (Kreis 2) is certainly longer, as only the direct route (as the crow flies) between Davos and Zürich (Kreis 2) has been calculated here.
Air line (approximately)
116 kilometers
63 nautical miles