The calculated distance (air line) between Uster / Kirch-Uster and Fribourg is approximately 83 miles respectively 133 kilometers.
By car or train, the actual journey to Fribourg is certainly longer, as only the direct route (as the crow flies) between Uster / Kirch-Uster and Fribourg has been calculated here.
Air line (approximately)
133 kilometers
72 nautical miles