Y8 7467 then AA 4989 at O'Hare
Indianapolis → Chicago → Lexington
Timetable, Chicago time
08:54Y8 7467 from Indianapolis at the gate
21:15AA 4989 to Lexington leaves the gate
12 h 21 apart on the timetable
AA 4989 leaves 12 h 21 after Y8 7467 arrives on the timetable: more than half a day, so not a connection we count.