I do not think that such a ticket exists today, or at least I do not know of it. There are so-called ‘RailAway’ offers which are maybe something similar, however there is no Railaway offer with Zermatt.
My recommendation is to just buy a regular ticket (‘Point-to-point ticket’) from Zürich Airport to Zermatt. This will allow you to travel with any connection, so you are flexible if your flight arrives delayed. For the return trip, you could consider buying a Supersaver’s ticket. This is a bit cheaper, but the connection is fixed (So you can not take a later/earlier train) and it is non-refundable. Avaliability also depends on the connection and booking date.
Note that the preset prices shown in the online timetable database are given for people owning a 50%-discount card (‘Half-Fare prices’).
Depending on your travel date, you can also opt for the Saver’s daypass. This is avaliable on all public transport in Switzerland that day. As with the Supersaver’s ticket, it is non-refundable and the prices and avaliability change every day. That would be an option for both arriving and departing.
The point-to-point ticket costs 134.- Swiss fracns for 2nd class and 229 for 1st class per trip and per person.
Unfortunately, there is no discount for travelling in a group or for elderly people.