AA 6476 then AS 2420 at Seattle
Los Angeles → Seattle → Portland (Oregon)
Timetable, Seattle time
11:49AA 6476 from Los Angeles at the gate
17:51AS 2420 to Portland (Oregon) leaves the gate
6 h 02 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
AA 6476 and AS 2420 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.