The calculated distance (air line) between Uster / Kirch-Uster and Bulle is approximately 93 miles respectively 150 kilometers.
By car or train, the actual journey to Bulle is certainly longer, as only the direct route (as the crow flies) between Uster / Kirch-Uster and Bulle has been calculated here.
Air line (approximately)
150 kilometers
81 nautical miles