The calculated distance (air line) between Bolligen and Zürich (Kreis 11) is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Zürich (Kreis 11) is certainly longer, as only the direct route (as the crow flies) between Bolligen and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles