The calculated distance (air line) between Zürich (Kreis 11) / Oerlikon and Chur is approximately 60 miles respectively 97 kilometers.
By car or train, the actual journey to Chur is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 11) / Oerlikon and Chur has been calculated here.
Air line (approximately)
97 kilometers
53 nautical miles