AA 1998 then AA 4523 at O'Hare
Los Angeles → Chicago → Indianapolis
Timetable, Chicago time
20:00AA 1998 from Los Angeles at the gate
20:45AA 4523 to Indianapolis leaves the gate
45 min apart on the timetable
The last days
AA 1998 and AA 4523 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.