Flight Sydney Airport departs from Sydney Sydney Airport at 17:35 and arrives at Perth Perth Airport at 20:40.
The flighttime is about 5h 05m. The distance travelled ("as the bird flies"): 3917 Km. So the average speed is roughly 771 Km.
There is an 2 hour time difference between Sydney and Perth
The best day to arrive at Sydney is Tuesday and it would be best to avoid Friday, as prices are on average 52.65% higher than on Tuesday. (Average prices, based on 7177961 datapoints.)
We have a lot more statistics for flights QF 571 and between Sydney and Perth.
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