I recall on SBB website that there used to be an airport-destination-airport ticket years back, but this doesn't seem to be the case any longer.
If you are only planning on taking a train from ZRH to Zermatt, then back a week or so later, would the best course of action (and most cost effective) be a Saver Day Pass? If so, how far in advance can you buy these? I'm looking at doing this in just over two months from now.
Thank you for the help and advice.