F9 2021 then DL 1561 at Detroit
Philadelphia → Detroit → Greenville-Spartanburg
Timetable, Detroit time
00:05F9 2021 from Philadelphia at the gate
19:45DL 1561 to Greenville-Spartanburg leaves the gate
19 h 40 apart on the timetable
DL 1561 leaves 19 h 40 after F9 2021 arrives on the timetable: more than half a day, so not a connection we count.