Querroannoo86
Beware, if looking up a ZRH Airport - Chur ticket and selecting the “Kloten” city upgrade, that would only cover the local zone 121 (Kloten area = airport location), NOT 110, therefore not of any value for you.
So if you want to visit Lindt on the way, probably the best idea is to get separate tickets for Airport - Rüschlikon (4 zones, 110 counts as double, single journey ticket validity = 2h) and a separate one for Rüschlikon - Chur (point-to-point ticket, valid all day). If you want to spend more than 1h in Zurich City, you might also need to split the airport-city and city-Rüschlikon tickets (3 zones each, validity = 1h!).
Note that the S8 based connections leaving Rüschlikon are going back to Zurich and therefore more expensive than the southbound S24 connections.
Alternatively you could also buy a zone 110+150 (3 zones) day pass in addition to the Airport-Chur ticket, but that’s probably the most expensive option.