AA 3239 then AA 4940 at O'Hare
Pittsburgh → Chicago → Nashville
Timetable, Chicago time
16:54AA 3239 from Pittsburgh at the gate
21:00AA 4940 to Nashville leaves the gate
4 h 06 apart on the timetable
The last days
AA 3239 and AA 4940 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.