My two boys ( age 12 years) and I are flying from Maine to Orlando with a change of planes at Dulles. I assume we should not have to go through TSA again since we will be checked in Maine, How far is the departure gate from the arrival gate? We arrive at 7:55am and the next flight leaves at 8:40am. Will this give us enough time to catch the next plane? Will the attendant at the arrivals gate call departures to tell them we are coming? Any advise is appreciated.