The calculated distance (air line) between Sankt Gallen and Zürich (Kreis 6) is approximately 39 miles respectively 63 kilometers.
By car or train, the actual journey to Zürich (Kreis 6) is certainly longer, as only the direct route (as the crow flies) between Sankt Gallen and Zürich (Kreis 6) has been calculated here.
Air line (approximately)
63 kilometers
34 nautical miles