The calculated distance (air line) between Riehen and Zürich (Kreis 11) is approximately 42 miles respectively 68 kilometers.
By car or train, the actual journey to Zürich (Kreis 11) is certainly longer, as only the direct route (as the crow flies) between Riehen and Zürich (Kreis 11) has been calculated here.
Air line (approximately)
68 kilometers
37 nautical miles