AA 3166 then SK 3961 at San Francisco
Philadelphia → San Francisco → Los Angeles
Timetable, San Francisco time
19:51AA 3166 from Philadelphia at the gatealso BA 5438
20:50SK 3961 to Los Angeles leaves the gate
59 min apart on the timetable
The last days
AA 3166 and SK 3961 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.