AA 5286 then AA 9781 at Philadelphia
Burlington → Philadelphia → Chicago O'Hare
Timetable, Philadelphia time
14:40AA 5286 from Burlington at the gate
18:00AA 9781 to Chicago O'Hare leaves the gate
3 h 20 apart on the timetable
The last days
AA 5286 and AA 9781 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.