The calculated distance (air line) between Martigny-Ville and La Chaux-de-Fonds is approximately 70 miles respectively 112 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 Martigny-Ville and La Chaux-de-Fonds has been calculated here.
Air line (approximately)
112 kilometers
61 nautical miles