DL 3913 then AA 4945 at Seattle
Portland (Oregon) → Seattle → Los Angeles
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
16:30AA 4945 to Los Angeles leaves the gate
19 h 40 apart on the timetable, overnight
AA 4945 leaves 19 h 40 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.