AA 4454 then AA 4548 at O'Hare
Indianapolis → Chicago → Des Moines
Timetable, Chicago time
06:00AA 4454 from Indianapolis at the gate
22:53AA 4548 to Des Moines leaves the gate
16 h 53 apart on the timetable
AA 4548 leaves 16 h 53 after AA 4454 arrives on the timetable: more than half a day, so not a connection we count.