The calculated distance (air line) between Herisau and Zürich (Kreis 3) is approximately 36 miles respectively 59 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 Herisau and Zürich (Kreis 3) has been calculated here.
Air line (approximately)
59 kilometers
32 nautical miles