AA 2975 then UA 3376 at O'Hare
Minneapolis → Chicago → St Louis
Timetable, Chicago time
17:26AA 2975 from Minneapolis at the gate
11:00UA 3376 to St Louis leaves the gate
17 h 34 apart on the timetable, overnight
UA 3376 leaves 17 h 34 after AA 2975 arrives on the timetable: more than half a day, so not a connection we count.