F9 2021 then DL 944 at Detroit
Philadelphia → Detroit → Seattle
Timetable, Detroit time
00:05F9 2021 from Philadelphia at the gate
16:35DL 944 to Seattle leaves the gate
16 h 30 apart on the timetable
DL 944 leaves 16 h 30 after F9 2021 arrives on the timetable: more than half a day, so not a connection we count.