The calculated distance (air line) between Brugg and La Chaux-de-Fonds is approximately 70 miles respectively 113 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 Brugg and La Chaux-de-Fonds has been calculated here.
Air line (approximately)
113 kilometers
61 nautical miles