DL 539 then DL 681 at Atlanta
Portland (Oregon) → Atlanta → San Francisco
Timetable, Atlanta time
19:27DL 539 from Portland (Oregon) at the gate
19:19DL 681 to San Francisco leaves the gate
23 h 52 apart on the timetable, overnight
DL 681 leaves 23 h 52 after DL 539 arrives on the timetable: more than half a day, so not a connection we count.