Flight Dulles International Airport departs from Washington Dulles International Airport at 15:40 and arrives at Los Angeles International Airport at 19:46.The flight has a short stop at New York.
The flighttime is about 7h 06m. The distance travelled ("as the bird flies"): 4550 Km. So the average speed is roughly 641 Km.
There is an 3 hour time difference between Washington and Los Angeles