Flight Sydney Airport departs from Sydney Sydney Airport at 20:25 and arrives at Darwin Darwin International Airport at 00:30.
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 Wednesday and it would be best to avoid Sunday, as prices are on average 462.41% higher than on Wednesday. (Average prices, based on 253346 datapoints.)
We have a lot more statistics for flights JQ 672 and between Sydney and Darwin.