DL 8849 then DL 1293 at Atlanta
Memphis → Atlanta → Boston
Timetable, Atlanta time
14:32DL 8849 from Memphis at the gate
12:30DL 1293 to Boston leaves the gate
21 h 58 apart on the timetable, overnight
DL 1293 leaves 21 h 58 after DL 8849 arrives on the timetable: more than half a day, so not a connection we count.