DL 3968 then WN 4721 at Seattle
Vancouver → Seattle → Oakland
Timetable, Seattle time
16:53DL 3968 from Vancouver at the gate
11:05WN 4721 to Oakland leaves the gate
18 h 12 apart on the timetable, overnight
WN 4721 leaves 18 h 12 after DL 3968 arrives on the timetable: more than half a day, so not a connection we count.