AA 3166 then NH 7509 at San Francisco
Philadelphia → San Francisco → Los Angeles
Timetable, San Francisco time
19:51AA 3166 from Philadelphia at the gatealso BA 5438
21:25NH 7509 to Los Angeles leaves the gate
1 h 34 apart on the timetable
The last days
AA 3166 and NH 7509 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.