Flight Sydney Airport departs from Sydney Sydney Airport at 10:20 and arrives at San Francisco International Airport at 06:55.
The flighttime is about 14h 35m. The distance travelled ("as the bird flies"): 11675 Km. So the average speed is roughly 801 Km.
There is an 18 hour time difference between Sydney and San Francisco
The best day to arrive at Sydney is Sunday and it would be best to avoid Monday, as prices are on average 969.02% higher than on Sunday. (Average prices, based on 10224 datapoints.)
We have a lot more statistics for flights UA 870 and between Sydney and San Francisco.