The calculated distance (air line) between Sankt Gallen and Zürich (Kreis 12) is approximately 37 miles respectively 60 kilometers.
By car or train, the actual journey to Zürich (Kreis 12) is certainly longer, as only the direct route (as the crow flies) between Sankt Gallen and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
60 kilometers
32 nautical miles