DL 1510 then DL 2539 at Atlanta
Miami → Atlanta → Greensboro
Timetable, Atlanta time
14:55DL 1510 from Miami at the gate
14:41DL 2539 to Greensboro leaves the gate
23 h 46 apart on the timetable, overnight
DL 2539 leaves 23 h 46 after DL 1510 arrives on the timetable: more than half a day, so not a connection we count.