Flight Dulles International Airport departs from Washington Dulles International Airport at 18:10 and arrives at San Francisco International Airport at 00:09.The flight has a short stop at Seattle.
The flighttime is about 8h 59m. The distance travelled ("as the bird flies"): 4994 Km. So the average speed is roughly 556 Km.
There is an 3 hour time difference between Washington and San Francisco