UA 3902 then AA 537 at O'Hare
Rio De Janeiro → Chicago → Hartford
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
08:10AA 537 to Hartford leaves the gate
15 h 09 apart on the timetable, overnight
AA 537 leaves 15 h 09 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.