The calculated distance (air line) between Monthey and Zürich (Kreis 11) is approximately 110 miles respectively 176 kilometers.
By car or train, the actual journey to Zürich (Kreis 11) is certainly longer, as only the direct route (as the crow flies) between Monthey and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
176 kilometers
95 nautical miles