The calculated distance (air line) between Oberwinterthur (Kreis 2) / Guggenbühl and Bern is approximately 73 miles respectively 117 kilometers.
By car or train, the actual journey to Bern is certainly longer, as only the direct route (as the crow flies) between Oberwinterthur (Kreis 2) / Guggenbühl and Bern has been calculated here.
Air line (approximately)
117 kilometers
63 nautical miles