Flight International Airport departs from Los Angeles International Airport at 22:45 and arrives at San Francisco International Airport at 00:11.
The flighttime is about 1h 26m. The distance travelled ("as the bird flies"): 487 Km. So the average speed is roughly 340 Km.
The best day to arrive at Los Angeles is Tuesday and it would be best to avoid Sunday, as prices are on average 703.44% higher than on Tuesday. (Average prices, based on 124813 datapoints.)
We have a lot more statistics for flights UA 1597 and between Los Angeles and San Francisco.