The calculated distance (air line) between Sierre and Zürich (Kreis 3) is approximately 87 miles respectively 140 kilometers.
By car or train, the actual journey to Zürich (Kreis 3) is certainly longer, as only the direct route (as the crow flies) between Sierre and Zürich (Kreis 3) has been calculated here.
Air line (approximately)
140 kilometers
75 nautical miles