DL 380 then DL 472 at Atlanta
Washington National → Atlanta → Seattle
Timetable, Atlanta time
14:22DL 380 from Washington National at the gate
14:05DL 472 to Seattle leaves the gate
23 h 43 apart on the timetable, overnight
DL 472 leaves 23 h 43 after DL 380 arrives on the timetable: more than half a day, so not a connection we count.