The calculated distance (air line) between Zürich (Kreis 12) / Schwamendingen-Mitte and Chur is approximately 59 miles respectively 95 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 12) / Schwamendingen-Mitte and Chur has been calculated here.
Air line (approximately)
95 kilometers
52 nautical miles