If you’re arriving directly at Innsbruck, you way will be:

1. From Innsbruck Airport (INN) take bus named F Neu-Rum Kaplanstraße. Coordinates of Bus stop in Airport 47.257413, 11.350979 (you can copy it and pasted in google map search) or click here
2. Go 12 stops till stop “Innsbruck Hauptbahnhof”
3. Take train “REX 2 Hochfilzen Bahnhof” / or “EC84 München Hbf” / or “RJX Flughafen Wien Bahnhof” to the train station Jenbach.Train schedule and buy tickets here
4. On Jenbach station change to train named “ZB1 Mayrhofen Bahnhof” which goes to Mayrhofen Bahnhof. Don’t worry about changing stop, it all in 1-2 mins walk from each other.
5. Here is the general information about arriving to Mayrhofen.
6. You also can follow the route built in Google maps by clicking the link

If you’re arriving to Munich Airport (MUC), you have 2 variations:

1st option

1. Directly to Mayrhofen train station with 2 transfers (changing train 2 times). Buy direct ticket from Airport to Mayrhofen train station here or here. Choose from "München Flughafen" to "Mayrhofen im Zillertal". Choose outbound and return dates and time.
1.1 This train way will be with 2 transfers - in the City Munich train station "München Ost" and on Jenbach Zillertalbahn train station. Don’t worry about changing stop, it all in 3 mins walk from each other.
1.2 You also can follow the route built in Google maps by clicking the link

2nd option

2. Take bus to Innsbruck. Flixbus schedule and tickets here.
2.2 On Flixbus web-site you need to choose From (Von) Munchen Flughagen (Munich Airport) To (Nach) Innsbruck and choose a date.

2.3 Go to train station "Innsbruck Hauptbahnhof" (click here to open google map)

2.4 Train schedule and buy tickets here. Choose from Choose from "Innsbruck Hbf" to "Mayrhofen im Zillertal".
This train way will be with 1 transfer - on train station Jenbach Zillertalbahn. Don’t worry about changing stop, it all in 1-2 mins walk from each other.
2.5 Here is the general information about arriving to Mayrhofen.
2.6 You also can follow the route built in Google maps by clicking the link