AA 6504 then F9 1342 at DFW
Flagstaff → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
09:28AA 6504 from Flagstaff at the gate
06:55F9 1342 to Chicago O'Hare leaves the gate
21 h 27 apart on the timetable, overnight
F9 1342 leaves 21 h 27 after AA 6504 arrives on the timetable: more than half a day, so not a connection we count.