The calculated distance (air line) between Stäfa and Zürich (Kreis 2) is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Zürich (Kreis 2) is certainly longer, as only the direct route (as the crow flies) between Stäfa and Zürich (Kreis 2) has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles