Train 19904 coming from Vienna will always make an additional stop in Vöcklamarkt at 9:37 am on Saturdays, Sundays and public holidays. Here you have the option of changing to the Stern & Hafferl Atterseebahn, which departs directly to Attersee at 09:41.
For the journey home, you can take the Atterseebahn, departing at 18:58 to Vöcklamarkt. Train 19929 then takes you back from Vöcklamarkt at 19:22 to Attnang-Puchheim, Wels and Linz and onwards to Vienna.
You can find all further details at www.westbahn.at.
You can also find your ideal connection in the digital Journey planner and in the OÖVV App.