AA 4400 then AA 3012 at O'Hare
Memphis → Chicago → Pittsburgh
Timetable, Chicago time
16:25AA 4400 from Memphis at the gate
17:00AA 3012 to Pittsburgh leaves the gate
35 min apart on the timetable
The last days
AA 4400 and AA 3012 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.