UA 3908 then AA 2604 at O'Hare
Fort Myers → Chicago → Austin
Timetable, Chicago time
14:19UA 3908 from Fort Myers at the gate
13:28AA 2604 to Austin leaves the gate
23 h 09 apart on the timetable, overnight
AA 2604 leaves 23 h 09 after UA 3908 arrives on the timetable: more than half a day, so not a connection we count.