The calculated distance (air line) between Sankt Gallen and Zürich (Kreis 11) is approximately 40 miles respectively 64 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 Sankt Gallen and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles