AA 4557 then AA 4498 at O'Hare
Indianapolis → Chicago → Harrisburg
Timetable, Chicago time
07:11AA 4557 from Indianapolis at the gate
11:45AA 4498 to Harrisburg leaves the gate
4 h 34 apart on the timetable
The last days
AA 4557 and AA 4498 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.