Originally Posted by jdrtravel

No. Gates can change frequently, you should check on your way to the airport. However, the flights from LAX-SFO are usually (almost always) at LAX terminal 3. There is a Sky Priority desk there for checking in and checking your luggage, and a Sky Priority security line.

Note that terminal 3 has minimal food options and is overcrowded. I would not try to spend a lot of extra time there. Arriving 60-75 minutes before your flight should be sufficient since you are in first class.