The calculated distance (air line) between Wattwil and Zürich (Kreis 9) is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Zürich (Kreis 9) is certainly longer, as only the direct route (as the crow flies) between Wattwil and Zürich (Kreis 9) has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles