AA 3040 then AA 6332 at O'Hare
Atlanta → Chicago → St Louis
Timetable, Chicago time
08:33AA 3040 from Atlanta at the gate
11:15AA 6332 to St Louis leaves the gate
2 h 42 apart on the timetable
The last days
AA 3040 and AA 6332 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.