DL 392 then DL 2457 at LAX
Washington National → Los Angeles → Portland (Oregon)
Timetable, Los Angeles time
19:32DL 392 from Washington National at the gate
18:30DL 2457 to Portland (Oregon) leaves the gate
22 h 58 apart on the timetable, overnight
DL 2457 leaves 22 h 58 after DL 392 arrives on the timetable: more than half a day, so not a connection we count.