Flight International Airport departs from San Francisco International Airport at 21:15 and arrives at Singapore Changi Airport at 05:45.
The flighttime is about -8h 0-750m. 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 Monday and it would be best to avoid Saturday, as prices are on average 141.65% higher than on Monday. (Average prices, based on 94379 datapoints.)
We have a lot more statistics for flights SQ 33 and between San Francisco and Singapore.
