AA 2137 then AA 3475 at O'Hare
Austin → Chicago → Appleton
Timetable, Chicago time
09:00AA 2137 from Austin at the gate
09:48AA 3475 to Appleton leaves the gate
48 min apart on the timetable
The last days
AA 2137 and AA 3475 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.