The calculated distance (air line) between Zürich (Kreis 7) / Hirslanden and Sitten is approximately 97 miles respectively 156 kilometers.
By car or train, the actual journey to Sitten is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 7) / Hirslanden and Sitten has been calculated here.
Air line (approximately)
156 kilometers
84 nautical miles