In July, I need to get to Ortisei in one day using the Half Fare Card and Saver Day Pass. I was planning on going Muerren to Mals/Malles via Disentis Muster, using the Glacier Express train from Brig to Chur.
However, due to a slight change in plans, I will also be taking the Glacier Express route from Chur to Zermatt the week prior, so I would prefer a different route to Ortisei.
Here is one route I was suggested but I can't find this itinerary on SBB (the Postbus):
Muerren dp by train 7.36 - Meiringen ar 9.07, dp 9.25 by Postbus via Grimsel Pass - Nufenen Pass to Airolo ar 12.56, dp by train 13.13 - Milan ar 15.50. Milan dp 16.15 - Verona PN 17.28/17.50 - Waidbruck 19.47/19.59 - Ortisei ar 20.27
If there's no great alternative, then maybe it's best I take the fastest/cheapest route.