DL 1121 then DL 3764 at Vancouver
Salt Lake City → Vancouver → Seattle (SEA)
Timetable, Vancouver time
13:13DL 1121 from Salt Lake City at the gate
08:26DL 3764 to Seattle (SEA) leaves the gate
19 h 13 apart on the timetable, overnight
DL 3764 leaves 19 h 13 after DL 1121 arrives on the timetable: more than half a day, so not a connection we count.