F9 2072 then DL 2279 at Philadelphia
Raleigh-Durham → Philadelphia → Atlanta
Timetable, Philadelphia time
16:24F9 2072 from Raleigh-Durham at the gate
14:18DL 2279 to Atlanta leaves the gate
21 h 54 apart on the timetable, overnight
DL 2279 leaves 21 h 54 after F9 2072 arrives on the timetable: more than half a day, so not a connection we count.