The calculated distance (air line) between Zürich (Kreis 1) and Montreux is approximately 101 miles respectively 162 kilometers.
By car or train, the actual journey to Montreux is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 1) and Montreux has been calculated here.
Air line (approximately)
162 kilometers
87 nautical miles