The calculated distance (air line) between Stuttgart and Zürich (Kreis 10) / Höngg is approximately 100 miles respectively 161 kilometers.
By car or train, the actual journey to Zürich (Kreis 10) / Höngg is certainly longer, as only the direct route (as the crow flies) between Stuttgart and Zürich (Kreis 10) / Höngg has been calculated here.
Air line (approximately)
161 kilometers
87 nautical miles