AA 3516 then AA 2997 at O'Hare
Lansing → Chicago → Washington National
Timetable, Chicago time
05:59AA 3516 from Lansing at the gate
06:59AA 2997 to Washington National leaves the gate
1 h apart on the timetable
The last days
AA 3516 and AA 2997 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.