Flight Sydney Airport departs from Sydney Sydney Airport at 08:15 and arrives at Darwin Darwin International Airport at 12:20.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 2904 Km. So the average speed is roughly 634 Km.
There is an 0.5 hour time difference between Sydney and Darwin
The best day to arrive at Sydney is Friday and it would be best to avoid Monday, as prices are on average 2895.08% higher than on Friday. (Average prices, based on 253091 datapoints.)
We have a lot more statistics for flights QF 840 and between Sydney and Darwin.
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