Milan to St Moritz on Bernina Express

Hi there. I am planning for a day trip to St Moritz from Milan, via the Bernina regional train & Bernina Express. I can't locate the timetables on the RHB website for my dates.
I am looking to travel on 15 December 2012, with the journey looking like this :
Trenord train Milano centrale- Tirano
Bernina regional train from Tirano - S. Moritz (timetable for train?)

Return :
Bernina Express - Tirano (what are the timetable?)
Tirano - Milano Centrale

How much are the cost for both Tirano-S. Moritz (via regional Bernina) and S. Moritz - Tirano (via Bernina Express)?
Thank you so much!

Hi ruluwee! You're right, timetables after December 8 aren't displayed at the Bernina website yet. However, the trains are mentioned in the regular timetable. A Bernina Express (indicated by BEX) to Pontresina/St. Moritz from Tirano leaves at 8.50am and 14.04pm from Tirano. Your trips between Milano and Tirano v.v. can also be found in this timetable. Travel and seat reservation fees for the Bernina Express are listed here; all further fares are visible in the timetable by clicking 'Fare/Buy' at the right of any connection.

I hopes this helps you out!

Thank you!