AA 5660 then DL 2171 at Detroit
Washington National → Detroit → Portland (Oregon)
Timetable, Detroit time
09:01AA 5660 from Washington National at the gate
08:50DL 2171 to Portland (Oregon) leaves the gate
23 h 49 apart on the timetable, overnight
DL 2171 leaves 23 h 49 after AA 5660 arrives on the timetable: more than half a day, so not a connection we count.