DL 3913 then DL 2949 at Seattle
Portland (Oregon) → Seattle → Las Vegas
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
20:07DL 2949 to Las Vegas leaves the gate
23 h 17 apart on the timetable, overnight
DL 2949 leaves 23 h 17 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.