AA 990 then AA 1743 at O'Hare
Phoenix → Chicago → Philadelphia
Timetable, Chicago time
11:39AA 990 from Phoenix at the gate
17:29AA 1743 to Philadelphia leaves the gate
5 h 50 apart on the timetable
The last days
AA 990 and AA 1743 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.