AA 540 then AA 2680 at O'Hare
Nashville → Chicago → Washington National
Timetable, Chicago time
11:05AA 540 from Nashville at the gate
14:52AA 2680 to Washington National leaves the gate
3 h 47 apart on the timetable
The last days
AA 540 and AA 2680 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.