The calculated distance (air line) between La Chaux-de-Fonds and Fribourg is approximately 26 miles respectively 41 kilometers.
By car or train, the actual journey to Fribourg is certainly longer, as only the direct route (as the crow flies) between La Chaux-de-Fonds and Fribourg has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles