If you are going to St. Anton and landing in Frankfurt, that is a fair drive onto the Arlberg in Austria. Or are you connecting to another flight to take you farther south?
I flew to the UK last year and to Austria this summer via Munich and never have a problem with my Mavic Pro. Do NOT put it in your checked luggage though, keep it as a carry on and keep it with you in the plane. I take three batteries and each has a padded compartment in my little hard shell case for the drone. I also added a piece of electrical tape over the terminals of each battery, though did not need it and had the batteries at about 35% after flying with each first before leaving to run them down a bit.
I also have a lot of DSLR gear in another carry on and have never had a problem going through the x-ray machines, they don't even ask to open the bag. I lived in Austria for 14 years so know it well, when you are there, take a quick trip to Lech, it is close by and a very pretty village with great skiing.
By the way, Austria has very strict rules/laws regarding flying, so do not fly it over the town of St. Anton or you may well have it taken away by the police and they have very stiff fines, with close by Switzerland being even worse. The laws are very, very restrictive, so if you want to fly, go outside in a remote place and fly away low from where you are then pop up and do your flying, away from crowds and then drop down away from your location at the end of your flight and bring it back low to where you took off. That way, if someone sees the drone and goes in search of the operator, they may be looking away from where you are, if they did not see it return low down to you. I also carry a DSLR around my neck so when I pack up and walk away, it looks like my backpack only may be a still camera pack.
Enjoy the Alps, whether your first time or going back, it will be stunning over there for you, lucky you.
