DL 2778 then DL 472 at Atlanta
Memphis → Atlanta → Seattle
Timetable, Atlanta time
15:54DL 2778 from Memphis at the gate
14:05DL 472 to Seattle leaves the gate
22 h 11 apart on the timetable, overnight
DL 472 leaves 22 h 11 after DL 2778 arrives on the timetable: more than half a day, so not a connection we count.