DL 763 then DL 2551 at LAX
Atlanta → Los Angeles → Portland (Oregon)
Timetable, Los Angeles time
19:55DL 763 from Atlanta at the gate
13:57DL 2551 to Portland (Oregon) leaves the gate
18 h 02 apart on the timetable, overnight
DL 2551 leaves 18 h 02 after DL 763 arrives on the timetable: more than half a day, so not a connection we count.