DL 3802 then AS 2174 at Seattle
Portland (Oregon) → Seattle → San Luis Obispo
Timetable, Seattle time
15:25DL 3802 from Portland (Oregon) at the gate
15:23AS 2174 to San Luis Obispo leaves the gate
23 h 58 apart on the timetable, overnight
AS 2174 leaves 23 h 58 after DL 3802 arrives on the timetable: more than half a day, so not a connection we count.