Flight International Airport departs from San Francisco International Airport at 22:05 and arrives at Singapore Changi Airport at 05:40.
The flighttime is about -9h 0-865m. The distance travelled ("as the bird flies"): 15083 Km. So the average speed is roughly 0 Km.
There is an 15 hour time difference between San Francisco and Singapore
The best day to arrive at San Francisco is Tuesday and it would be best to avoid Friday, as prices are on average 68.3% higher than on Tuesday. (Average prices, based on 23657 datapoints.)
We have a lot more statistics for flights SQ 33 and between San Francisco and Singapore.