AA 2146 then AA 2700 at O'Hare
Boston → Chicago → Washington National
Timetable, Chicago time
08:00AA 2146 from Boston at the gate
08:52AA 2700 to Washington National leaves the gate
52 min apart on the timetable
The last days
AA 2146 and AA 2700 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.