The calculated distance (air line) between Arth and Zürich (Kreis 12) is approximately 24 miles respectively 38 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 Arth and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
38 kilometers
21 nautical miles