The calculated distance (air line) between Zürich (Kreis 2) / Wollishofen and Kriens is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Kriens is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 2) / Wollishofen and Kriens has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles