F9 2021 then DL 852 at Detroit
Philadelphia → Detroit → Los Angeles
Timetable, Detroit time
00:05F9 2021 from Philadelphia at the gate
18:20DL 852 to Los Angeles leaves the gate
18 h 15 apart on the timetable
DL 852 leaves 18 h 15 after F9 2021 arrives on the timetable: more than half a day, so not a connection we count.