The calculated distance (air line) between Malters and Zürich (Kreis 12) is approximately 31 miles respectively 51 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 Malters and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
51 kilometers
27 nautical miles