DL 3913 then AS 749 at Seattle
Portland (Oregon) → Seattle → Las Vegas
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
14:43AS 749 to Las Vegas leaves the gate
17 h 53 apart on the timetable, overnight
AS 749 leaves 17 h 53 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.