AS 221 then AS 401 at Seattle
Spokane → Seattle → Phoenix
Timetable, Seattle time
07:20AS 221 from Spokane at the gate
11:48AS 401 to Phoenix leaves the gate
4 h 28 apart on the timetable
Seattle’s board gives a departure time for only about 56% of its flights, so many days show no gate time.
The last days
AS 221 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.