The calculated distance (air line) between Riehen and Zürich (Kreis 10) is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Zürich (Kreis 10) is certainly longer, as only the direct route (as the crow flies) between Riehen and Zürich (Kreis 10) has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles