The calculated distance (air line) between Winterthur and Zürich (Kreis 2) is approximately 15 miles respectively 24 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 Winterthur and Zürich (Kreis 2) has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles