DL 1007 then DL 2778 at Atlanta
Washington National → Atlanta → Memphis
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
12:15DL 2778 to Memphis leaves the gate
14 h 34 apart on the timetable, overnight
DL 2778 leaves 14 h 34 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.