DL 3968 then AS 2 at Seattle
Vancouver → Seattle → Washington National
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
13:57AS 2 to Washington National leaves the gate
21 h 04 apart on the timetable, overnight
AS 2 leaves 21 h 04 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.