Thanks in advance for all the help and recommendations. I have read through some of the posts and done some research including the website Man in Seat 61, but I an still confusted.
We will be taking the Bernina (BEX) train ( the dedicated BEX train at 14:26) from Tirano to Chur then continuing onto Zurich.
The Rhb website (Rhaetian Railway) seems easier to use and I will get the BEX tickets there, but it seems I can only get the Tirano to Chur segment - not the connection to Zurich.
For the Chur to Zurich section is my only option to use the SBB website ?
The SBB webste seems more complicated than RHB. Is there another website to buy this segment ?
Is it possible to buy this segment at the station either in Chur or Tirano or do I need to get it in advance ?
Thanks for all your help.