The calculated distance (air line) between Pfäffikon / Pfäffikon (Dorfkern) and Chur is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Chur is certainly longer, as only the direct route (as the crow flies) between Pfäffikon / Pfäffikon (Dorfkern) and Chur has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles