The calculated distance (air line) between Zürich (Kreis 3) / Friesenberg and Luzern is approximately 24 miles respectively 38 kilometers.
By car or train, the actual journey to Luzern is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 3) / Friesenberg and Luzern has been calculated here.
Air line (approximately)
38 kilometers
20 nautical miles