The calculated distance (air line) between Langnau and Zürich (Kreis 6) is approximately 47 miles respectively 76 kilometers.
By car or train, the actual journey to Zürich (Kreis 6) is certainly longer, as only the direct route (as the crow flies) between Langnau and Zürich (Kreis 6) has been calculated here.
Air line (approximately)
76 kilometers
41 nautical miles