AA 9866 then CV 2 at O'Hare
Marquette → Chicago → Indianapolis
Timetable, Chicago time
10:30AA 9866 from Marquette at the gate
21:45CV 2 to Indianapolis leaves the gate
11 h 15 apart on the timetable
The last days
AA 9866 and CV 2 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.