AA 475 then F9 1342 at DFW
New York JFK → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
09:37AA 475 from New York JFK at the gate
06:55F9 1342 to Chicago O'Hare leaves the gate
21 h 18 apart on the timetable, overnight
F9 1342 leaves 21 h 18 after AA 475 arrives on the timetable: more than half a day, so not a connection we count.