UA 3902 then AA 1238 at O'Hare
Rio De Janeiro → Chicago → Fort Myers
Timetable, Chicago time
17:01UA 3902 from Rio De Janeiro at the gate
12:22AA 1238 to Fort Myers leaves the gate
19 h 21 apart on the timetable, overnight
AA 1238 leaves 19 h 21 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.