The calculated distance (air line) between Ascona and Zürich (Kreis 7) is approximately 85 miles respectively 136 kilometers.
By car or train, the actual journey to Zürich (Kreis 7) is certainly longer, as only the direct route (as the crow flies) between Ascona and Zürich (Kreis 7) has been calculated here.
Air line (approximately)
136 kilometers
74 nautical miles