The calculated distance (air line) between Jona and Zürich (Kreis 7) is approximately 16 miles respectively 25 kilometers.
By car or train, the actual journey to Zürich (Kreis 7) is certainly longer, as only the direct route (as the crow flies) between Jona and Zürich (Kreis 7) has been calculated here.
Air line (approximately)
25 kilometers
14 nautical miles