AA 2819 then UA 3916 at O'Hare
New York JFK → Chicago → New Orleans
Timetable, Chicago time
09:30AA 2819 from New York JFK at the gate
07:00UA 3916 to New Orleans leaves the gate
21 h 30 apart on the timetable, overnight
UA 3916 leaves 21 h 30 after AA 2819 arrives on the timetable: more than half a day, so not a connection we count.