The calculated distance (air line) between Bülach and Zürich (Kreis 11) is approximately 7 miles respectively 11 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 Bülach and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
11 kilometers
6 nautical miles