F9 2021 then UA 3439 at Detroit
Philadelphia → Detroit → Newark
Timetable, Detroit time
00:05F9 2021 from Philadelphia at the gate
17:12UA 3439 to Newark leaves the gate
17 h 07 apart on the timetable
UA 3439 leaves 17 h 07 after F9 2021 arrives on the timetable: more than half a day, so not a connection we count.