F9 3985 then AA 1974 at DFW
Philadelphia → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
08:47F9 3985 from Philadelphia at the gate
06:12AA 1974 to Chicago O'Hare leaves the gate
21 h 25 apart on the timetable, overnight
AA 1974 leaves 21 h 25 after F9 3985 arrives on the timetable: more than half a day, so not a connection we count.