The calculated distance (air line) between Zürich (Kreis 7) / Hirslanden and Dietikon is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Dietikon is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 7) / Hirslanden and Dietikon has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles