AA 3131 then UA 3376 at O'Hare
Minneapolis → Chicago → St Louis
Timetable, Chicago time
15:55AA 3131 from Minneapolis at the gate
11:00UA 3376 to St Louis leaves the gate
19 h 05 apart on the timetable, overnight
UA 3376 leaves 19 h 05 after AA 3131 arrives on the timetable: more than half a day, so not a connection we count.