F9 2021 then DL 4646 at Detroit
Philadelphia → Detroit → Harrisburg
Timetable, Detroit time
00:05F9 2021 from Philadelphia at the gate
14:50DL 4646 to Harrisburg leaves the gate
14 h 45 apart on the timetable
DL 4646 leaves 14 h 45 after F9 2021 arrives on the timetable: more than half a day, so not a connection we count.