Flight Jacksons International Airport departs from Port Moresby Jacksons International Airport at 06:20 and arrives at Sydney Sydney Airport at 10:15.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 2375 Km. So the average speed is roughly 606 Km.
The best month to arrive at Port Moresby is October and the most expensive month to fly is July. (Average prices, based on 208 datapoints.)
We have a lot more statistics for flights SQ1 and between Port Moresby and Sydney.