hi there,
Best way to find cheap flights to Austria is to find deals at the last minute and also by booking in advance.
Another good thing to do is to choose to land at Graz,
Linz, and other cities rather than
Vienna, this way you could save a small fortune.
Also, avoid winter and summer months as it is the busiest times to travel to Austria. April through May sees the cheapest time to book airfare to Austria.
Hope this helps
Vacationbuddy