AA 901 then AA 1431 at Miami
San Francisco → Miami → Chicago O'Hare
Timetable, Miami time
05:00AA 901 from San Francisco at the gate
08:37AA 1431 to Chicago O'Hare leaves the gate
3 h 37 apart on the timetable
The last days
AA 901 and AA 1431 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.