F9 2072 then DL 8938 at Philadelphia
Raleigh-Durham → Philadelphia → Detroit
Timetable, Philadelphia time
16:24F9 2072 from Raleigh-Durham at the gate
14:00DL 8938 to Detroit leaves the gate
21 h 36 apart on the timetable, overnight
DL 8938 leaves 21 h 36 after F9 2072 arrives on the timetable: more than half a day, so not a connection we count.