The calculated distance (air line) between La Chaux-de-Fonds and Zürich (Kreis 3) is approximately 81 miles respectively 130 kilometers.
By car or train, the actual journey to Zürich (Kreis 3) is certainly longer, as only the direct route (as the crow flies) between La Chaux-de-Fonds and Zürich (Kreis 3) has been calculated here.
Air line (approximately)
130 kilometers
70 nautical miles