F9 2021 then DL 2822 at Detroit
Philadelphia → Detroit → St Louis
Timetable, Detroit time
00:05F9 2021 from Philadelphia at the gate
16:30DL 2822 to St Louis leaves the gate
16 h 25 apart on the timetable
DL 2822 leaves 16 h 25 after F9 2021 arrives on the timetable: more than half a day, so not a connection we count.