AS 3166 then AA 727 at Seattle
Portland (Oregon) → Seattle → Dallas-Fort Worth
Timetable, Seattle time
13:19AS 3166 from Portland (Oregon) at the gate
17:47AA 727 to Dallas-Fort Worth leaves the gate
4 h 28 apart on the timetable
Seattle’s board gives a departure time for only about 57% of its flights, so many days show no gate time.
The last days
AS 3166 and AA 727 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.