DL 728 then DL 541 at Seattle
Detroit → Seattle → Washington
Timetable, Seattle time
14:50DL 728 from Detroit at the gate
11:55DL 541 to Washington leaves the gate
21 h 05 apart on the timetable, overnight
DL 541 leaves 21 h 05 after DL 728 arrives on the timetable: more than half a day, so not a connection we count.