The calculated distance (air line) between Zürich (Kreis 4) / Hard and Fribourg is approximately 75 miles respectively 121 kilometers.
By car or train, the actual journey to Fribourg is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 4) / Hard and Fribourg has been calculated here.
Air line (approximately)
121 kilometers
66 nautical miles