AA 1242 then AA 880 at Philadelphia
Phoenix → Philadelphia → Chicago O'Hare
Timetable, Philadelphia time
07:37AA 1242 from Phoenix at the gate
10:40AA 880 to Chicago O'Hare leaves the gate
3 h 03 apart on the timetable
The last days
AA 1242 and AA 880 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.