AA 2407 then WN 3812 at San Francisco
Philadelphia → San Francisco → Los Angeles
Timetable, San Francisco time
11:35AA 2407 from Philadelphia at the gate
12:40WN 3812 to Los Angeles leaves the gate
1 h 05 apart on the timetable
The last days
AA 2407 and WN 3812 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.