The calculated distance (air line) between Zürich (Kreis 3) / Sihlfeld and Lugano is approximately 97 miles respectively 155 kilometers.
By car or train, the actual journey to Lugano is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 3) / Sihlfeld and Lugano has been calculated here.
Air line (approximately)
155 kilometers
84 nautical miles