I searched nearest airports (Wroclaw, Prague, Dresden, Krakow) and the shortest duration is 24 hours and 5 minutes. Expanding the search to Frankfurt, Warsaw, and Berlin turned up shortest flight at 21h, 45m (Frankfurt, Singagapore Airlines).

There are NOT any nonstop flights between Australia and Poland. Some sources show times if *if* an airline did fly it nonstop between 2 cities, based on average speeds, but this is not reality for those of us who can not afford to hire jumbo jets for private trips (a smaller jet would require refueling 2-3x, and therefore more travel time).

From Sydney to Warsaw a direct would be approx. 20 Hrs 22 Min. You can get flight times for airports all over the world at