DL 512 then DL 2065 at Atlanta
Dallas → Atlanta → Philadelphia
Timetable, Atlanta time
18:59DL 512 from Dallas at the gate
18:55DL 2065 to Philadelphia leaves the gate
23 h 56 apart on the timetable, overnight
DL 2065 leaves 23 h 56 after DL 512 arrives on the timetable: more than half a day, so not a connection we count.