Flight International Airport departs from Los Angeles International Airport at 21:30 and arrives at San Francisco International Airport at 23:00.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 487 Km. So the average speed is roughly 325 Km.
The best day to arrive at Los Angeles is Wednesday and it would be best to avoid Sunday, as prices are on average 511.83% higher than on Wednesday. (Average prices, based on 124863 datapoints.)
We have a lot more statistics for flights UA 2056 and between Los Angeles and San Francisco.