AA 753 then AA 4536 at O'Hare
Philadelphia → Chicago → Indianapolis
Timetable, Chicago time
19:30AA 753 from Philadelphia at the gate
22:30AA 4536 to Indianapolis leaves the gate
3 h apart on the timetable
The last days
AA 753 and AA 4536 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.