AA 2123 then AA 4543 at O'Hare
Los Angeles → Chicago → Indianapolis
Timetable, Chicago time
20:04AA 2123 from Los Angeles at the gate
06:43AA 4543 to Indianapolis leaves the gate
10 h 39 apart on the timetable, overnight
The last days
AA 2123 and AA 4543 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.