DL 629 then DL 541 at Seattle
Atlanta → Seattle → Washington
Timetable, Seattle time
14:30DL 629 from Atlanta at the gate
11:55DL 541 to Washington leaves the gate
21 h 25 apart on the timetable, overnight
DL 541 leaves 21 h 25 after DL 629 arrives on the timetable: more than half a day, so not a connection we count.