AA 1275 then AA 4748 at O'Hare
Newark → Chicago → Pittsburgh
Timetable, Chicago time
07:28AA 1275 from Newark at the gate
09:45AA 4748 to Pittsburgh leaves the gate
2 h 17 apart on the timetable
The last days
AA 1275 and AA 4748 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.