The calculated distance (air line) between Amriswil and Zürich (Kreis 12) is approximately 35 miles respectively 56 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 Amriswil and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles