The calculated distance (air line) between Montreux and Zürich (Kreis 3) is approximately 99 miles respectively 159 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 Montreux and Zürich (Kreis 3) has been calculated here.
Air line (approximately)
159 kilometers
86 nautical miles