AA 2812 then AA 1509 at Boston
Los Angeles → Boston → Chicago O'Hare
Timetable, Boston time
23:59AA 2812 from Los Angeles at the gate
07:00AA 1509 to Chicago O'Hare leaves the gate
7 h 01 apart on the timetable, overnight
The last days
AA 2812 and AA 1509 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.