The calculated distance (air line) between Hombrechtikon and La Chaux-de-Fonds is approximately 92 miles respectively 148 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 Hombrechtikon and La Chaux-de-Fonds has been calculated here.
Air line (approximately)
148 kilometers
80 nautical miles