The calculated distance (air line) between Stäfa and Zürich (Kreis 12) is approximately 13 miles respectively 21 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 Stäfa and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles