The calculated distance (air line) between Zürich (Kreis 11) / Oerlikon and Winterthur is approximately 11 miles respectively 17 kilometers.
By car or train, the actual journey to Winterthur is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 11) / Oerlikon and Winterthur has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles