AA 545 then AA 1854 at Philadelphia
Phoenix → Philadelphia → Chicago O'Hare
Timetable, Philadelphia time
05:15AA 545 from Phoenix at the gate
12:41AA 1854 to Chicago O'Hare leaves the gate
7 h 26 apart on the timetable
The last days
AA 545 and AA 1854 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.