Flight Changi Airport departs from Singapore Changi Airport at 10:10 and arrives at San Francisco International Airport at 09:00.
The flighttime is about 13h 50m. The distance travelled ("as the bird flies"): 15083 Km. So the average speed is roughly 1090 Km.
There is an 15 hour time difference between Singapore and San Francisco
The best day to arrive at Singapore is Sunday and it would be best to avoid Thursday, as prices are on average 71.49% higher than on Sunday. (Average prices, based on 164917 datapoints.)
We have a lot more statistics for flights UA2 and between Singapore and San Francisco.
