UA 3908 then AA 3239 at O'Hare
Fort Myers → Chicago → Pittsburgh
Timetable, Chicago time
14:19UA 3908 from Fort Myers at the gate
12:29AA 3239 to Pittsburgh leaves the gate
22 h 10 apart on the timetable, overnight
AA 3239 leaves 22 h 10 after UA 3908 arrives on the timetable: more than half a day, so not a connection we count.