AA 2644 then AA 3384 at O'Hare
Pittsburgh → Chicago → Champaign
Timetable, Chicago time
09:05AA 2644 from Pittsburgh at the gate
13:48AA 3384 to Champaign leaves the gate
4 h 43 apart on the timetable
The last days
AA 2644 and AA 3384 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.