The calculated distance (air line) between Jona and Zürich (Kreis 12) is approximately 17 miles respectively 28 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 Jona and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles