AA 2999 then UA 3916 at O'Hare
Dallas-Fort Worth → Chicago → New Orleans
Timetable, Chicago time
10:05AA 2999 from Dallas-Fort Worth at the gate
07:00UA 3916 to New Orleans leaves the gate
20 h 55 apart on the timetable, overnight
UA 3916 leaves 20 h 55 after AA 2999 arrives on the timetable: more than half a day, so not a connection we count.