AA 2452 then AA 1747 at Miami
Chicago O'Hare → Miami → Austin
Timetable, Miami time
10:22AA 2452 from Chicago O'Hare at the gate
14:16AA 1747 to Austin leaves the gate
3 h 54 apart on the timetable
The last days
AA 2452 and AA 1747 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.