AS 331 then AA 1954 at San Francisco
Los Angeles → San Francisco → Chicago O'Hare
Timetable, San Francisco time
13:39AS 331 from Los Angeles at the gatealso QR 2111
23:36AA 1954 to Chicago O'Hare leaves the gatealso QF 3241
9 h 57 apart on the timetable
The last days
AS 331 and AA 1954 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.