DL 1510 then AA 861 at Miami
Atlanta → Miami → Philadelphia
Timetable, Miami time
11:46DL 1510 from Atlanta at the gate
11:40AA 861 to Philadelphia leaves the gate
23 h 54 apart on the timetable, overnight
AA 861 leaves 23 h 54 after DL 1510 arrives on the timetable: more than half a day, so not a connection we count.