QF 7550 then AA 2378 at O'Hare
New York JFK → Chicago → Dallas-Fort Worth
Timetable, Chicago time
20:00QF 7550 from New York JFK at the gate
08:29AA 2378 to Dallas-Fort Worth leaves the gate
12 h 29 apart on the timetable, overnight
AA 2378 leaves 12 h 29 after QF 7550 arrives on the timetable: more than half a day, so not a connection we count.