4 nights in Switzerland itinerary help

what time is the flight (home?) on Sunday am?

I take that this is a continuation of your previous questions?

I think this is the first time that Andermatt has come up, nice TINY place way up high in April so there will probably be loads of snow depending on which direction you are looking (snow may be gone on south facing slopes, depending on the actual weather, and still in abundance on north facing, watch for avalanche warnings if the snow is loose), and how will you get from Andermatt to Chur? Presumably Glacier Express and a connection, or regional trains?

Then to Pontresina, presumably by continuation of Glacier Express or Bernina Express or regional trains? And back to Chur?

Flight home is 11am on Sunday so from what I can tell it's about a 50 minute train ride from Lucerne to Zurich airport. So plan is to leave pretty early Sunday morning to get to airport.

I was originally thinking of heading to Tirano from Milan and doing the Bernina express. But it seemed like it might be a pain with doing a train and then bus and seemed a touch longer travel time than going to Andermatt. But I could be wrong, that is what I'm hoping I'll hear more on from this forum.

Yes, we were going to do the Glacier express from Andermatt to Chur. Or regional trains if they do the same route. What I'm not sure on is do we stay in Chur for 2 nights and do a day trip on the Bernina to Pontresina and explore around there, or only one night in Chur. Either explore around Chur or still do the Bernina to Pontresina and then head to Lucerne right away?

So in getting more information from a Tripadvisor forum, it sounds like I'm better off doing the full Bernina express route and staying somewhere like Pontresina or Samedan for 2 nights. Then from there we'll head to Lucerne for 2 nights.