By plane and public transport
The nearest airport is Zurich International, from here the train is a simple and quick way to get to Flims. From the airport change in Zurich HB, and take trains to Chur, which takes around 1hr 40mins. A Post Bus runs from just above the station straight to Flims.
By Car
From Zurich, the car journey takes around 2 hours, cars are available to rent at the airport (https://www.hertz.com/ren...), motorways 3 then 13 followed by secondary road 19 bring you to Flims.