The calculated distance (air line) between Chur and Zürich (Kreis 7) is approximately 58 miles respectively 93 kilometers.
By car or train, the actual journey to Zürich (Kreis 7) is certainly longer, as only the direct route (as the crow flies) between Chur and Zürich (Kreis 7) has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles