DL 3913 then AS 552 at Seattle
Portland (Oregon) → Seattle → Las Vegas
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
16:33AS 552 to Las Vegas leaves the gate
19 h 43 apart on the timetable, overnight
AS 552 leaves 19 h 43 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.