AA 4483 then UA 3916 at O'Hare
Baltimore → Chicago → New Orleans
Timetable, Chicago time
13:18AA 4483 from Baltimore at the gate
07:00UA 3916 to New Orleans leaves the gate
17 h 42 apart on the timetable, overnight
UA 3916 leaves 17 h 42 after AA 4483 arrives on the timetable: more than half a day, so not a connection we count.