AA 1153 then AA 5503 at Atlanta
Chicago O'Hare → Atlanta → Washington National
Timetable, Atlanta time
11:05AA 1153 from Chicago O'Hare at the gate
16:55AA 5503 to Washington National leaves the gate
5 h 50 apart on the timetable
The last days
AA 1153 and AA 5503 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.