UA 3908 then AA 3436 at O'Hare
Fort Myers → Chicago → Rochester (ROC)
Timetable, Chicago time
14:19UA 3908 from Fort Myers at the gate
11:55AA 3436 to Rochester (ROC) leaves the gate
21 h 36 apart on the timetable, overnight
AA 3436 leaves 21 h 36 after UA 3908 arrives on the timetable: more than half a day, so not a connection we count.