The calculated distance (air line) between Liestal and Zürich (Kreis 9) is approximately 36 miles respectively 57 kilometers.
By car or train, the actual journey to Zürich (Kreis 9) is certainly longer, as only the direct route (as the crow flies) between Liestal and Zürich (Kreis 9) has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles