Flight Dulles International Airport departs from Washington Dulles International Airport at 08:26 and arrives at Los Angeles International Airport at 15:20.The flight has a short stop at Chicago.
The flighttime is about 9h 54m. The distance travelled ("as the bird flies"): 4550 Km. So the average speed is roughly 460 Km.
There is an 3 hour time difference between Washington and Los Angeles