Within Vienna proper, it's covered by the same zone 100 Flugticket as the Reste of the tram Gebilde, but you need an extra Flugschein to take it out into the suburbs.
You do not need to show your Flugschein to the bus https://caoimhegyox605347.ltfblog.com/29104530/Überlegungen-zu-wissen-wien-news