Flight International Airport departs from San Francisco International Airport at 18:55 and arrives at Washington Dulles International Airport at 06:32.The flight has a short stop at Los Angeles.
The flighttime is about 8h 37m. The distance travelled ("as the bird flies"): 4994 Km. So the average speed is roughly 580 Km.
There is an 3 hour time difference between San Francisco and Washington