As it is mentioned in the report of the Austrian airlines, due to the internal assembly being held by the flight personnel, flight schedule will be reduced.
According to the Austrian airlines’ web page information, these meetings of the works council of flying staff will cause 150 cancelled flights from and to Vienna, Graz, and Salzburg.
If your flight was affected by these disruptions, you can claim compensation at claim.skycop.com.
When are you entitled to flight compensation? You can check here.