AS 2011 then UA 3926 at Seattle
Vancouver → Seattle → San Francisco
Timetable, Seattle time
07:08AS 2011 from Vancouver at the gate
10:30UA 3926 to San Francisco leaves the gate
3 h 22 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 2011 and UA 3926 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.