The calculated distance (air line) between Uster / Kirch-Uster and Zürich (Kreis 12) is approximately 8 miles respectively 13 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 Uster / Kirch-Uster and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles