AA 639 then AA 4689 at Atlanta
Chicago O'Hare → Atlanta → Washington National
Timetable, Atlanta time
09:59AA 639 from Chicago O'Hare at the gate
20:15AA 4689 to Washington National leaves the gate
10 h 16 apart on the timetable
The last days
AA 639 and AA 4689 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.