AA 428 then AS 612 at Phoenix
Philadelphia → Phoenix → Seattle
Timetable, Phoenix time
09:23AA 428 from Philadelphia at the gate
15:34AS 612 to Seattle leaves the gate
6 h 11 apart on the timetable
The last days
AA 428 and AS 612 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.