UA 2856 then AA 4753 at O'Hare
Austin → Chicago → Indianapolis
Timetable, Chicago time
18:40UA 2856 from Austin at the gate
06:44AA 4753 to Indianapolis leaves the gate
12 h 04 apart on the timetable, overnight
AA 4753 leaves 12 h 04 after UA 2856 arrives on the timetable: more than half a day, so not a connection we count.