Originally Posted by Gabrielle
I would HIGHLY recommend you renting car from LA or trying to catch a ride with someone. I'd be shocked if you'll find bus service--it's quite in the middle of nowhere. And it would be a pricey Uber ride from LAX, though you might be able to Uber from a nearby hotel. Still, a car rental might be cheaper overall with fewer hassles.
And LAX is the closest airport servicing the London directly. You can look at San Diego if you don't mind hours of driving.
There are busses that go from LAX to several towns in the area and you can Uber from there. I know several people who did that this year.