Flight Dulles International Airport departs from Washington Dulles International Airport at 06:00 and arrives at Chicago O'Hare International Airport at 22:58.The flight has a short stop at Los Angeles.
The flighttime is about 17h 58m. The distance travelled ("as the bird flies"): 1162 Km. So the average speed is roughly 65 Km.
There is an 1 hour time difference between Washington and Chicago