Flight Dulles International Airport departs from Washington Dulles International Airport at 06:00 and arrives at Los Angeles International Airport at 20:18.The flight has a short stop at New York.
The flighttime is about 17h 18m. The distance travelled ("as the bird flies"): 4550 Km. So the average speed is roughly 263 Km.
There is an 3 hour time difference between Washington and Los Angeles