DL 3913 then AA 2783 at Seattle
Portland (Oregon) → Seattle → Phoenix
Timetable, Seattle time
20:50DL 3913 from Portland (Oregon) at the gate
15:30AA 2783 to Phoenix leaves the gate
18 h 40 apart on the timetable, overnight
AA 2783 leaves 18 h 40 after DL 3913 arrives on the timetable: more than half a day, so not a connection we count.