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