The calculated distance (air line) between Zürich (Kreis 7) / Witikon and Emmen is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Emmen is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 7) / Witikon and Emmen has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles