UA 1635 then AA 5477 at Atlanta
Washington → Atlanta → Washington National
Timetable, Atlanta time
00:35UA 1635 from Washington at the gate
07:01AA 5477 to Washington National leaves the gate
6 h 26 apart on the timetable
The last days
UA 1635 and AA 5477 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.