DL 3968 then AS 688 at Seattle
Vancouver → Seattle → San Francisco
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
13:50AS 688 to San Francisco leaves the gate
20 h 57 apart on the timetable, overnight
AS 688 leaves 20 h 57 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.