UA 3501 then AA 4452 at O'Hare
Detroit → Chicago → New Orleans
Timetable, Chicago time
06:57UA 3501 from Detroit at the gate
21:15AA 4452 to New Orleans leaves the gate
14 h 18 apart on the timetable
AA 4452 leaves 14 h 18 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.