The calculated distance (air line) between Winterthur and Zürich (Kreis 11) is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Zürich (Kreis 11) is certainly longer, as only the direct route (as the crow flies) between Winterthur and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles