Do factor in some flight delay + queues at Immigration upon disembarkation.
After disembarking the plane, we needed to take the sky train to Immigration.
It usually takes us 1hr (that’s in mid September) to clear Immigration. Of course longer if many flights are coming in around the same time.
So for us, about 1.5hrs all in, to get to the train platform. This doesn’t include being stopped at Customs. So far they let us through without checking our bags or questioning us.
On our last trip we bought Super Saver tickets and thankfully we gave ourselves 4.5hrs to catch the train from Zurich HB. The flight was delayed and we arrived 2hrs later than scheduled.
The trains from Zurich airport to Zurich Main station (Zurich HB) run quite often. But it’s the connecting train from Zurich HB that you must not miss. Otherwise there are no refunds at all.
Also check which platforms you are arriving at in Zurich HB. It’s a massive station and if it’s your first time, you will need to orientate yourself so don’t cut it too fine.
As there are several levels at the main station, I did a lot of work to ensure I took the right train from the airport that would arrive on the same level as the level for my connecting train.
I am not sure whether your journey requires any transfers in between. So from personal experience, give yourself ample time so you dont miss any of your trains.
With 5 px, it is substantial with the savings but also a risk since there are no refunds. It’s not so risky if its a direct route without transfers.
I have never travelled to Switzerland around Christmas time. Our past 3 trips were in mid-September. 2nd class is equally comfortable but we chose 1st Class as it was easier to find room for our luggages. Also for more peace & quiet.
But choosing 1st Class means you have more to lose if you miss the trains under your Super Saver.
The biggest risk is the day of arrival in Zurich, due to unforeseen delays. So when I gave ourselves 4.5hrs to catch the train at Zurich HB, it was a relief when I had just enough time to catch the train at Zurich HB main station. Our flight arrival was in the morning.
So I agree with rockoyster about the risks. Hence, if you choose that option, give ample time for flight delay, long immigration Q, orientation at the train station and finding the right platform etc.
All the best!