The calculated distance (air line) between Gstaad and La Chaux-de-Fonds is approximately 49 miles respectively 78 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 Gstaad and La Chaux-de-Fonds has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles