UA 3908 then AA 4541 at O'Hare
Fort Myers → Chicago → Indianapolis
Timetable, Chicago time
14:19UA 3908 from Fort Myers at the gate
12:38AA 4541 to Indianapolis leaves the gate
22 h 19 apart on the timetable, overnight
AA 4541 leaves 22 h 19 after UA 3908 arrives on the timetable: more than half a day, so not a connection we count.