AA 4557 then UA 3874 at O'Hare
Indianapolis → Chicago → LCQ
Timetable, Chicago time
07:11AA 4557 from Indianapolis at the gate
06:30UA 3874 to LCQ leaves the gate
23 h 19 apart on the timetable, overnight
UA 3874 leaves 23 h 19 after AA 4557 arrives on the timetable: more than half a day, so not a connection we count.