The calculated distance (air line) between Uznach and Zürich (Kreis 12) is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Zürich (Kreis 12) is certainly longer, as only the direct route (as the crow flies) between Uznach and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles