Flight Dulles International Airport departs from Washington Dulles International Airport at 08:30 and arrives at Houston George Bush Intercontinental Airport at 15:05.The flight has a short stop at San Francisco.
The flighttime is about 7h 35m. The distance travelled ("as the bird flies"): 1984 Km. So the average speed is roughly 262 Km.
There is an 1 hour time difference between Washington and Houston