DL 9966 then AS 401 at Seattle
Seoul → Seattle → Phoenix
Timetable, Seattle time
07:10DL 9966 from Seoul at the gate
11:48AS 401 to Phoenix leaves the gate
4 h 38 apart on the timetable
Seattle’s board gives a departure time for only about 58% of its flights, so many days show no gate time.
The last days
DL 9966 and AS 401 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.