The calculated distance (air line) between Zürich (Kreis 11) / Oerlikon and Uster is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Uster is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 11) / Oerlikon and Uster has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles