AA 3580 then AA 2570 at O'Hare
Louisville → Chicago → Salt Lake City
Timetable, Chicago time
13:30AA 3580 from Louisville at the gate
14:00AA 2570 to Salt Lake City leaves the gate
30 min apart on the timetable
The last days
AA 3580 and AA 2570 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.