The calculated distance (air line) between Frutigen and Zürich (Kreis 7) is approximately 70 miles respectively 112 kilometers.
By car or train, the actual journey to Zürich (Kreis 7) is certainly longer, as only the direct route (as the crow flies) between Frutigen and Zürich (Kreis 7) has been calculated here.
Air line (approximately)
112 kilometers
61 nautical miles