UA 3902 then AA 6332 at O'Hare
Rio De Janeiro → Chicago → St Louis
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
11:15AA 6332 to St Louis leaves the gate
18 h 14 apart on the timetable, overnight
AA 6332 leaves 18 h 14 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.