AA 2407 then AA 1837 at San Francisco
Philadelphia → San Francisco → Phoenix
Timetable, San Francisco time
11:35AA 2407 from Philadelphia at the gate
16:00AA 1837 to Phoenix leaves the gatealso QR 9224
4 h 25 apart on the timetable
The last days
AA 2407 and AA 1837 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.